Truxal, J. G. (1989). Feedback-Automation. Research foundation of State University of New York.
Lua i Stíl Chicago (17ú heag.)Truxal, John G. Feedback-Automation. Stony Brook: Research foundation of State University of New York, 1989.
Lua MLA (9ú heag.)Truxal, John G. Feedback-Automation. Research foundation of State University of New York, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.