APA (7th ed.) Citation

Gravil, R. (2007). Existentialism. Humanities-Ebooks.

Chicago Style (17th ed.) Citation

Gravil, Richard. Existentialism. Tirril [England]: Humanities-Ebooks, 2007.

MLA (9th ed.) Citation

Gravil, Richard. Existentialism. Humanities-Ebooks, 2007.