APA-referens (7:e uppl.)

Hullfish, H. G., & Smith, P. G. (1961). Reflective thinking: The method of education. Dodd, Mead.

Chicago-referens (17:e uppl.)

Hullfish, Henry Gordon, och Philip G. Smith. Reflective Thinking: The Method of Education. New York: Dodd, Mead, 1961.

MLA-referens (9:e uppl.)

Hullfish, Henry Gordon, och Philip G. Smith. Reflective Thinking: The Method of Education. Dodd, Mead, 1961.