Banathy, B. H. (1968). Instructional systems. Fearon Publishers.
Lua i Stíl Chicago (17ú heag.)Banathy, Bela H. Instructional Systems. Palo Alto, Calif.: Fearon Publishers, 1968.
Lua MLA (8ú heag.)Banathy, Bela H. Instructional Systems. Fearon Publishers, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.