Lua APA (7ú heag.)
Witherspoon, A. (1973). Common errors in english and how to avoid them. Littlefield.
Lua i Stíl Chicago (17ú heag.)
Witherspoon, Alexander. Common Errors in English and How to Avoid Them. New Jersey: Littlefield, 1973.
Lua MLA (9ú heag.)
Witherspoon, Alexander. Common Errors in English and How to Avoid Them. Littlefield, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.