APA (7th ed.) Citation

McManus, K. M. (2019). Two can keep a secret. Penguin Books.

Chicago Style (17th ed.) Citation

McManus, Karen M. Two Can Keep a Secret. London: Penguin Books, 2019.

MLA (9th ed.) Citation

McManus, Karen M. Two Can Keep a Secret. Penguin Books, 2019.

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