APA (7th ed.) Citation

Wodehouse, P. G. (1977). Aunts aren't gentlemen. Penguin Books.

Chicago Style (17th ed.) Citation

Wodehouse, Pelham G. Aunts Aren't Gentlemen. Harmondsworth [u.a.]: Penguin Books, 1977.

MLA (9th ed.) Citation

Wodehouse, Pelham G. Aunts Aren't Gentlemen. Penguin Books, 1977.