Cita APA (7a ed.)

Macquarrie, J. (1973). Existentialism: An introduction, guide and assessment. Penguin.

Cita Chicago Style (17a ed.)

Macquarrie, John. Existentialism: An Introduction, Guide and Assessment. London: Penguin, 1973.

Cita MLA (9a ed.)

Macquarrie, John. Existentialism: An Introduction, Guide and Assessment. Penguin, 1973.