APA (7th ed.) Citation

Usher, S. (2021). Letters of note. Penguin Books.

Chicago Style (17th ed.) Citation

Usher, Shaun. Letters of Note. New York: Penguin Books, 2021.

MLA (8th ed.) Citation

Usher, Shaun. Letters of Note. Penguin Books, 2021.

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