APA Citation

Ahern, C. (2011). P.S. I love you. aLondon: HarperCollins Publisher.

Chicago Style Citation

Ahern, Cecelia. P.S. I Love You. aLondon: HarperCollins Publisher, 2011.

MLA Citation

Ahern, Cecelia. P.S. I Love You. aLondon: HarperCollins Publisher, 2011.

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