Não informado. (1972). Education. National School Public Relations Association.
Citação do estilo Chicago (17ª ed.)Não informado. Education. Washington: National School Public Relations Association, 1972.
Citação MLA (8ª ed.)Não informado. Education. National School Public Relations Association, 1972.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.