Παραπομπή APA

Lipman, M. (1977). Discovering philosophy (2nd edition.). Prentice- Hall Inc..

Παραπομπή Chicago Style

Lipman, Mathew. Discovering Philosophy. 2nd edition. New Jersey: Prentice- Hall Inc., 1977.

Παραπομπή MLA

Lipman, Mathew. Discovering Philosophy. 2nd edition. Prentice- Hall Inc., 1977.