Kinney, J. (2010). Dairy of a Wimpy Kid: The Ugly truth. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Kinney, Jeff. Dairy of a Wimpy Kid: The Ugly Truth. London: Penguin Books, 2010.
Lua MLA (9ú heag.)Kinney, Jeff. Dairy of a Wimpy Kid: The Ugly Truth. Penguin Books, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.