APA (7th ed.) Citation

Smullyan, R. M. (1983). The lady or the tiger? Penguin Books.

Chicago Style (17th ed.) Citation

Smullyan, Raymond M. The Lady or the Tiger? Harmondsworth: Penguin Books, 1983.

MLA (9th ed.) Citation

Smullyan, Raymond M. The Lady or the Tiger? Penguin Books, 1983.

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