Perry, F. M. (1906). An introductory course in argumentation. American book company.
Lua i Stíl Chicago (17ú heag.)Perry, F. M. An Introductory Course in Argumentation. New York: American book company, 1906.
Lua MLA (8ú heag.)Perry, F. M. An Introductory Course in Argumentation. American book company, 1906.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.