Não informado. (1987). National Business Education Yearbook. National Business Education Association.
Style de citation Chicago (17e éd.)Não informado. National Business Education Yearbook. Reston, Va: National Business Education Association, 1987.
Style de citation MLA (8e éd.)Não informado. National Business Education Yearbook. National Business Education Association, 1987.
Attention : ces citations peuvent ne pas être correctes à 100%.