Allred, R. A., & Wolinski, J. T. (1990). McGraw-Hill spelling. McGraw-Hill School Division.
Lua i Stíl Chicago (17ú heag.)Allred, Ruel A., agus John T. Wolinski. McGraw-Hill Spelling. New York: McGraw-Hill School Division, 1990.
Lua MLA (8ú heag.)Allred, Ruel A., agus John T. Wolinski. McGraw-Hill Spelling. McGraw-Hill School Division, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.