Sviokla, J. J., & Shapiro, B. P. (1993). Keeping customers (11th ed.). HBR.
シカゴスタイル引用形Sviokla, John J., , Benson P. Shapiro. Keeping Customers. 11th ed. HBR, 1993.
MLA引用形式Sviokla, John J., , Benson P. Shapiro. Keeping Customers. 11th ed. HBR, 1993.
警告: この引用は必ずしも正確ではありません.