Cita APA (7th ed.)

Blackham, H. J. (1989). Six existentialist thinkers. Routledge.

Cita Chicago (17th ed.)

Blackham, H. J. Six Existentialist Thinkers. London: Routledge, 1989.

Cita MLA (9th ed.)

Blackham, H. J. Six Existentialist Thinkers. Routledge, 1989.