^Orange Coast Magazine. Emmis Communications. May 1990. pg. 177. "In early Christian days, a believer confronted by evil or hostile influences implored the power of the Holy Cross for protection by twisting his middle finger over his forefinger and holding the remaining fingers down with his thumb."
^Field Guide to Gestures. Quirk Books. 2003. pg. 201. "Children are a big proponent of this gesture, though they usually use it when telling white lies, believing that having the fingers crossed behind the back makes it okay to fib."
^fingers crossed. Theidioms.com. The Idioms Dictionary. [2022-03-29]. (原始内容存档于2022-04-02).
^Good Housekeeping, Volume 226. International Magazine Company. 1998. Crossing fingers: This was a Sign of the Cross that early Christians could use to avert bad luck without attracting the notice-and wrath-of pagans.