Organ, T. W. (1965). The art of critical thinkingTroy Wilson Organ. Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Organ, Troy Wilson. The Art of Critical ThinkingTroy Wilson Organ. Houghton Mifflin, 1965.
Lua MLA (8ú heag.)Organ, Troy Wilson. The Art of Critical ThinkingTroy Wilson Organ. Houghton Mifflin, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.