Não informado. (1952). Adult leadership. Adult Education Association of the United States of America.
Lua i Stíl Chicago (17ú heag.)Não informado. Adult Leadership. Washington: Adult Education Association of the United States of America, 1952.
Lua MLA (8ú heag.)Não informado. Adult Leadership. Adult Education Association of the United States of America, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.