APA (7th ed.) Citation

Sagan, F., & Ash, I. (1955). Bonjour tristesse. John Murray.

Chicago Style (17th ed.) Citation

Sagan, Francoise, and Irene Ash. Bonjour Tristesse. London: John Murray, 1955.

MLA (9th ed.) Citation

Sagan, Francoise, and Irene Ash. Bonjour Tristesse. John Murray, 1955.

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