Não informado. (1987). Marketing library services. Learned Information.
Chicagoスタイル(17版)引用形式Não informado. Marketing Library Services. Medford, NJ: Learned Information, 1987.
MLA(8版)引用形式Não informado. Marketing Library Services. Learned Information, 1987.
警告: この引用は必ずしも正確ではありません.