एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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