APA (7th ed.) Citation

Blackham, H. J. (1961). Six existentialist thinkers. Routledge & Kegan Paul.

Chicago Style (17th ed.) Citation

Blackham, H. J. Six Existentialist Thinkers. London: Routledge & Kegan Paul, 1961.

MLA (8th ed.) Citation

Blackham, H. J. Six Existentialist Thinkers. Routledge & Kegan Paul, 1961.

Warning: These citations may not always be 100% accurate.