APA (7th ed.) Citation

Ahern Cecelia. (2020). PS, I love you. Hachette Books.

Chicago Style (17th ed.) Citation

Ahern Cecelia. PS, I Love You. New York: Hachette Books, 2020.

MLA (8th ed.) Citation

Ahern Cecelia. PS, I Love You. Hachette Books, 2020.

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