Não informado. (1987). National Business Education Yearbook. National Business Education Association.
Citação do estilo Chicago (17ª ed.)Não informado. National Business Education Yearbook. Reston, Va: National Business Education Association, 1987.
Citação MLA (8ª ed.)Não informado. National Business Education Yearbook. National Business Education Association, 1987.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.