APA-referens (7:e uppl.)
Collins, P. M. (2009). A twentieth-century collision: American intellectual culture and Pope John Paul II's idea of a university. University Press of America.
Chicago-referens (17:e uppl.)
Collins, Peter M. A Twentieth-century Collision: American Intellectual Culture and Pope John Paul II's Idea of a University. Lanham, Md.: University Press of America, 2009.
MLA-referens (9:e uppl.)
Collins, Peter M. A Twentieth-century Collision: American Intellectual Culture and Pope John Paul II's Idea of a University. University Press of America, 2009.
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