Osborn, M. (1988). Public speaking. Houghton Mifflin Co..
Lua i Stíl Chicago (17ú heag.)Osborn, Michael. Public Speaking. Boston: Houghton Mifflin Co., 1988.
Lua MLA (9ú heag.)Osborn, Michael. Public Speaking. Houghton Mifflin Co., 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.