APA (7th ed.) Citation

Marian Keyes. (2012). Anybody Out There? Penguin Books.

Chicago Style (17th ed.) Citation

Marian Keyes. Anybody Out There? England: Penguin Books, 2012.

MLA (9th ed.) Citation

Marian Keyes. Anybody Out There? Penguin Books, 2012.

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