「境界的人間...とは、2つの社会を、2つの、単に異なっているだけではなく敵対しあう文化を、生きるべく運命づけられた存在であり...彼の精神は、2つの異なる、容易には溶解しない文化が、溶解し、全体的あるいは部分的に融合する、るつぼとなるのである。」(Robert E. Park, 1937)
「出かけて、豪華なホテルのラウンジに、簡易宿泊所の玄関口に座ってみたまえ。ゴールド・コーストのベンチに、スラムの寝床に座ってみたまえ。オーケストラホールや、スター・アンド・ガーター劇場のバーレスクの客席にも座ってみたまえ。要するに、出かけて、本当の調査をやって、自分のズボンの尻を汚して来いということだ。」 (Robert Park, 1927)
「シカゴ大学において、アメリカ社会学は方法論よりも人々に関わるようなり、ロバート・エズラ・パークは境界的人格という着想を展開させた (Park & Burgess, 1921)。パークは、原始的社会において人々を結びつける紐帯となる忠誠心は、彼らが社会に対して感じていた恐怖心や憎悪の度合いと、正比例すると考えた。この概念は、エスノセントリズム(自民族中心主義)と内部集団/外部集団の性質の理論へと展開した。集団の連帯の強さは、集団外に向けられた敵意の度合いと相関する。」Billie Davis, Marginality in a Pluralistic Society
1903: Masse und Publikum. Eine methodologische und soziologische Untersuchung (Ph.D. thesis) publ. Berlin: Lack & Grunau, 1904
1912: The Man Farthest Down: a Record of Observation and Study in Europe withBooker T Washington, New York: Doubleday
1921: Introduction to the Science of Sociology (with Ernest Burgess) Chicago: University of Chicago Press
1921: Old World Traits Transplanted: the Early Sociology of Culture with Herbert A Miller, & Kenneth Thompson, New York: Harper & Brothers
1922: The Immigrant Press and Its Control New York: Harper & Brothers
1925: The City: Suggestions for the Study of Human Nature in the Urban Environment (with R. D. McKenzie & Ernest Burgess) Chicago: University of Chicago Press
1928: Human Migration and the Marginal Man, American Journal of Sociology 33: 881-893
1932: The University and the Community of Races Hawaii: University of Hawaii Press
1932: The Pilgrims of Russian-Town The Community of Spiritual Christian Jumpers in America, by Pauline V. Young Ph.D. with an Introduction by Robert E. Park, Chicago: University of Chicago Press
1937: Cultural Conflict and the Marginal Man. in Everett V Stonequist, The Marginal Man, Park's Introduction, New York: Charles Scribner's Sons
1939: Race relations and the Race Problem; a Definition and an Analysis with Edgar Tristram Thompson, Durham, NC: Duke University Press
1940: Essays in Sociology with C W M Hart, and Talcott Parsons et al., Toronto: University of Toronto Press
1946: An Outline of the Principles of Sociology, with Samuel Smith, New York: Barnes & Noble, Inc
1952: Human Communities: the City and Human Ecology Glencoe, Ill: The Free Press
1955: Societies, Glencoe Ill: The Free Press
1967: On Social Control and Collective Behavior, Chicago: University of Chicago Press, ISBN 1-135-54381-X
1969: Human Migration and the Marginal Man. in The Classic Essays on the Culture of Cities. Ed. Richard Sennett. New York: Appleton-Century-Crofts, 1969, pp. 131-142
1975: The Crowd and the Public and Other Essays, Heritage of Society
^M., Gross (2004). “Human Geography and Ecological Sociology: The Unfolding of a Human Ecology, 1890 to 1930--and Beyond” (full text). Social Science History28 (4): 575. doi:10.1215/01455532-28-4-575.
Rauschenbush, Winifred. 1979. Robert E. Park: Biography of a Sociologist, Durham, N.C.: Duke University Press.
Turner, Ralph H. 1967. Robert E. Park: On Social Control and Collective Behavior, Chicago: University of Chicago Press. (an anthology of Park's writings)
Ballis Lal, Barbara. 1990. The Romance of Culture in an Urban Civilization: Robert E. Park on Race and Ethnic Relations in Cities, London & New York: Routledge.
Gross, Matthias. 2004. Human Geography and Ecological Sociology: The Unfolding of a Human Ecology, 1890 to 1930 – and Beyond. Social Science History 28(4): 575-605.
Matthews, Fred H. 1977. Quest for an American Sociology: Robert E. Park and the Chicago School, Montreal: McGill-Queen's University Press.
Matthews, Fred H. 1989. Social Scientists and the Culture Concept, 1930–1950: The Conflict Between the Processual and Structural Approaches. Sociological Theory 7: 87-101.