Gostick, A. (2007). The carrot principle. Free Press.
Lua i Stíl Chicago (17ú heag.)Gostick, Adrian. The Carrot Principle. New York: Free Press, 2007.
Lua MLA (9ú heag.)Gostick, Adrian. The Carrot Principle. Free Press, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.