Não informado. (1952). Adult leadership. Adult Education Association of the United States of America.
Style de citation Chicago (17e éd.)Não informado. Adult Leadership. Washington: Adult Education Association of the United States of America, 1952.
Style de citation MLA (8e éd.)Não informado. Adult Leadership. Adult Education Association of the United States of America, 1952.
Attention : ces citations peuvent ne pas être correctes à 100%.