Citazione Stile APA (7a Edizione)

CHRISTIAN, . J. L. (1977). Philosophy: An introduction to the art of wondering (2nd ed.). Holt, Rinehart and Winston.

Citazione stile Chigago Style (17a edizione)

CHRISTIAN, James Lee. Philosophy: An Introduction to the Art of Wondering. 2nd ed. New York: Holt, Rinehart and Winston, 1977.

Citatione MLA (9a ed.)

CHRISTIAN, James Lee. Philosophy: An Introduction to the Art of Wondering. 2nd ed. Holt, Rinehart and Winston, 1977.