Não informado. (1950). Adult Education. American Association for Adult & Continuing Education.
Chicago-viite (17. p.)Não informado. Adult Education. Chapel Hill, NC: American Association for Adult & Continuing Education, 1950.
MLA-viite (8. p.)Não informado. Adult Education. American Association for Adult & Continuing Education, 1950.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.