Não informado. (1989). Adults Learning. National Institute of Adult Continuing Education.
Chicagoスタイル(17版)引用形式Não informado. Adults Learning. Leicester, Inglaterra: National Institute of Adult Continuing Education, 1989.
MLA(8版)引用形式Não informado. Adults Learning. National Institute of Adult Continuing Education, 1989.
警告: この引用は必ずしも正確ではありません.