Cita APA (7a ed.)

Ferber, R. (2015). Key concepts in philosophy: An introduction. Academia.

Cita Chicago Style (17a ed.)

Ferber, Rafael. Key Concepts in Philosophy: An Introduction. Sankt Augustin: Academia, 2015.

Cita MLA (9a ed.)

Ferber, Rafael. Key Concepts in Philosophy: An Introduction. Academia, 2015.