Azar, b. s. (1989). Understanding and using english grammar. Prentice Hall Regents.
Lua i Stíl Chicago (17ú heag.)Azar, betty schrampher. Understanding and Using English Grammar. Prentice Hall Regents, 1989.
Lua MLA (9ú heag.)Azar, betty schrampher. Understanding and Using English Grammar. Prentice Hall Regents, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.