Axford, R. W. (1969). Adult education: The open door. International Textbook.
Lua i Stíl Chicago (17ú heag.)Axford, Roger W. Adult Education: The Open Door. Scranton, Pa: International Textbook, 1969.
Lua MLA (9ú heag.)Axford, Roger W. Adult Education: The Open Door. International Textbook, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.