APA (7th ed.) Citation

Aubrey, C. (1981). Who's watching you? Penguin Books.

Chicago Style (17th ed.) Citation

Aubrey, Crispin. Who's Watching You? Harmondsworth [u.a.]: Penguin Books, 1981.

MLA (8th ed.) Citation

Aubrey, Crispin. Who's Watching You? Penguin Books, 1981.