Não informado. (1987). National Business Education Yearbook. National Business Education Association.
Chicagoスタイル(17版)引用形式Não informado. National Business Education Yearbook. Reston, Va: National Business Education Association, 1987.
MLA(8版)引用形式Não informado. National Business Education Yearbook. National Business Education Association, 1987.
警告: この引用は必ずしも正確ではありません.