APA-referens (7:e uppl.)

CHRISTIAN, J. L. (1973). Philosophy: An introduction to the art of wondering. Rinehart Press.

Chicago-referens (17:e uppl.)

CHRISTIAN, James L. Philosophy: An Introduction to the Art of Wondering. San Francisco: Rinehart Press, 1973.

MLA-referens (9:e uppl.)

CHRISTIAN, James L. Philosophy: An Introduction to the Art of Wondering. Rinehart Press, 1973.