Cita APA (7a ed.)

Armstrong, A. (1957). An introduction to anciet philosophy (3 ed.). Methuen.

Cita Chicago Style (17a ed.)

Armstrong, A.H. An Introduction to Anciet Philosophy. 3 ed. London: Methuen, 1957.

Cita MLA (8a ed.)

Armstrong, A.H. An Introduction to Anciet Philosophy. 3 ed. Methuen, 1957.