APA (7th ed.) Citation

Harper, R. (1948). Existentialism, a theory of man. Harvard Univ. Press.

Chicago Style (17th ed.) Citation

Harper, Ralph. Existentialism, a Theory of Man. Cambridge: Harvard Univ. Press, 1948.

MLA (9th ed.) Citation

Harper, Ralph. Existentialism, a Theory of Man. Harvard Univ. Press, 1948.

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