APA (7th ed.) Citation

Lipman, M., Sharp, A. M., & Oscanyan, F. S. (1977). Philosophy in the classroom. [publisher not identified].

Chicago Style (17th ed.) Citation

Lipman, Matthew, Ann Margaret Sharp, and Frederick S. Oscanyan. Philosophy in the Classroom. [Place of publication not identified]: [publisher not identified], 1977.

MLA (9th ed.) Citation

Lipman, Matthew, et al. Philosophy in the Classroom. [publisher not identified], 1977.