RAY, C. M. (1983). Supervision Charles M. Ray , Charles L. Eison. The Dryden Press.
Lua i Stíl Chicago (17ú heag.)RAY, Charles M. Supervision Charles M. Ray , Charles L. Eison. The Dryden Press, 1983.
Lua MLA (8ú heag.)RAY, Charles M. Supervision Charles M. Ray , Charles L. Eison. The Dryden Press, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.