APA (7th ed.) Citation

Callahan, W. J. (1992). The enneagram for youth. Loyola Univ. Press.

Chicago Style (17th ed.) Citation

Callahan, William J. The Enneagram for Youth. Chicago: Loyola Univ. Press, 1992.

MLA (8th ed.) Citation

Callahan, William J. The Enneagram for Youth. Loyola Univ. Press, 1992.

Warning: These citations may not always be 100% accurate.