APA (7th ed.) Citation

Sontag, S. (1979). On photography / Susan Sontag. Penguin.

Chicago Style (17th ed.) Citation

Sontag, Susan. On Photography / Susan Sontag. Harmondsworth: Penguin, 1979.

MLA (9th ed.) Citation

Sontag, Susan. On Photography / Susan Sontag. Penguin, 1979.

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