APA (7th ed.) Citation

Ahern, C. (2007). PS, I love you. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Ahern, Cecelia. PS, I Love You. London: HarperCollins Publishers, 2007.

MLA (9th ed.) Citation

Ahern, Cecelia. PS, I Love You. HarperCollins Publishers, 2007.

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