APA-referens (7:e uppl.)

Astin, A. W., & Lee, C. B. T. (1972). The invisible colleges: A profile of small, private colleges with limited resources. McGraw-Hill.

Chicago-referens (17:e uppl.)

Astin, Alexander W., och Calvin B. T. Lee. The Invisible Colleges: A Profile of Small, Private Colleges with Limited Resources. New York: McGraw-Hill, 1972.

MLA-referens (9:e uppl.)

Astin, Alexander W., och Calvin B. T. Lee. The Invisible Colleges: A Profile of Small, Private Colleges with Limited Resources. McGraw-Hill, 1972.