Citazione APA

Roberts, M. L. (1999). Direct marketing management (2nd ed.). Prentice-Hall of India.

Stile di citazione Chicago

Roberts, Mary Lou. Direct Marketing Management. 2nd ed. London: Prentice-Hall of India, 1999.

Citazione MLA

Roberts, Mary Lou. Direct Marketing Management. 2nd ed. Prentice-Hall of India, 1999.