Não informado. (1950). Adult Education. American Association for Adult & Continuing Education.
Citação do estilo Chicago (17ª ed.)Não informado. Adult Education. Chapel Hill, NC: American Association for Adult & Continuing Education, 1950.
Citação MLA (8ª ed.)Não informado. Adult Education. American Association for Adult & Continuing Education, 1950.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.