Roberts, M. L. (1999). Direct marketing management (2nd ed.). Prentice-Hall of India.
シカゴスタイル引用形Roberts, Mary Lou. Direct Marketing Management. 2nd ed. London: Prentice-Hall of India, 1999.
MLA引用形式Roberts, Mary Lou. Direct Marketing Management. 2nd ed. Prentice-Hall of India, 1999.
警告: この引用は必ずしも正確ではありません.