Cowell, D. W. (1993). Services marketing (3rd ed.). Butterworth-Heinemann.
Chicagoスタイル(17版)引用形式Cowell, Donald W. Services Marketing. 3rd ed. Oxford: Butterworth-Heinemann, 1993.
MLA(9版)引用形式Cowell, Donald W. Services Marketing. 3rd ed. Butterworth-Heinemann, 1993.
警告: この引用は必ずしも正確ではありません.