^Ronan, Margaret, Foreword to The Shadow over Innsmouth and Other Stories of Horror, Scholastic Book Services, 1971
^H. P. Lovecraft, letter to August Derleth, December 10, 1931; cited in Joshi and Schultz, p. 238. cite: has all the defects I deplore—especially in point of style, where hackneyed phrases & rhythms have crept in despite all precautions.... No—I don't intend to offer 'The Shadow over Innsmouth' for publication, for it would stand no chance of acceptance.
^Farnsworth Wright, letter to August Derleth, January 17, 1933; cited in Joshi and Schultz, pp. 238–239.cite: I have read Lovecraft's story...and must confess that it fascinates me... But I don't know just what I can do with it. It is hard to break a story of this kind into two parts, and it is too long to run complete in one part.
^H. P. Lovecraft. Letters to J. Vernon Shea, Carl F. Strauch and Lee McBride White. ed. S. T. Joshi and David E. Schultz. NY: Hippocampus Press, 2016, p. 378
^Lin Carter, Lovecraft: A Look Behind the Cthulhu Mythos, p. 83.
^August Derleth, "H. P. Lovecraft—Outsider," p. 18, Crypt of Cthulhu #93.
Chalker, Jack L.; Mark Owings. The Science-Fantasy Publishers: A Bibliographic History, 1923-1998. Westminster, MD and Baltimore: Mirage Press, Ltd. 1998: 705.
Derleth, August. H. P. Lovecraft—Outsider. Crypt of Cthulhu. 1996, 15 (3) [1937]. Robert M. Price (ed.), West Warwick, RI: Necronomicon Press. Original publication: H. P. Lovecraft—Outsider. River. June 1937, 1 (3).
Lovecraft, Howard P. [1936]. The Shadow over Innsmouth. S. T. Joshi (编). The Dunwich Horror and Others 9th corrected printing. Sauk City, WI: Arkham House. 1984. ISBN 0-87054-037-8. Definitive version.