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.
警告：这些引文格式不一定是100％准确.