Cita APA (7th ed.)

Katen, T. E. (1973). Doing philosophy. Prentice-Hall.

Cita Chicago (17th ed.)

Katen, Thomas Ellis. Doing Philosophy. Englewood Cliffs, N. J: Prentice-Hall, 1973.

Cita MLA (9th ed.)

Katen, Thomas Ellis. Doing Philosophy. Prentice-Hall, 1973.