Não informado. (1972). Education. National School Public Relations Association.
Chicagoスタイル(17版)引用形式Não informado. Education. Washington: National School Public Relations Association, 1972.
MLA(8版)引用形式Não informado. Education. National School Public Relations Association, 1972.
警告: この引用は必ずしも正確ではありません.