APA (7th ed.) Citation

Barker, P. (2013). Toby's room (1. publ. in Penguin books.). Penguin Books.

Chicago Style (17th ed.) Citation

Barker, Pat. Toby's Room. 1. publ. in Penguin books. London [u.a.]: Penguin Books, 2013.

MLA (9th ed.) Citation

Barker, Pat. Toby's Room. 1. publ. in Penguin books. Penguin Books, 2013.