Cita APA (7a ed.)

Emmet, E. (1970). Learning to philosophize. Penguin Books.

Cita Chicago Style (17a ed.)

Emmet, E.R. Learning to Philosophize. Harmondsworth: Penguin Books, 1970.

Cita MLA (9a ed.)

Emmet, E.R. Learning to Philosophize. Penguin Books, 1970.