APA (7th ed.) Citation

Beauvoir, S. d. (1965). The Prime of Life. Penguin Books.

Chicago Style (17th ed.) Citation

Beauvoir, Simone de. The Prime of Life. London: Penguin Books, 1965.

MLA (9th ed.) Citation

Beauvoir, Simone de. The Prime of Life. Penguin Books, 1965.