Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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