Cline, J., Williams, K., & Donlan, D. (1969). Spectrum: Literature, language, and composition. Ginn.
Lua i Stíl Chicago (17ú heag.)Cline, Jay, Ken Williams, agus Dan Donlan. Spectrum: Literature, Language, and Composition. [Boston, Mass.: Ginn, 1969.
Lua MLA (8ú heag.)Cline, Jay, et al. Spectrum: Literature, Language, and Composition. Ginn, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.