APA (7th ed.) Citation

Blackham, H. J. (1961). Six existentialist thinkers (5th imp.). Routledge & Kegan Paul.

Chicago Style (17th ed.) Citation

Blackham, H. J. Six Existentialist Thinkers. 5th imp. London: Routledge & Kegan Paul, 1961.

MLA (9th ed.) Citation

Blackham, H. J. Six Existentialist Thinkers. 5th imp. Routledge & Kegan Paul, 1961.

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