Roberts, M. L., & Berger, P. D. (1989). Direct marketing management / Mary Lou Roberts, Paul D. Berger. Prentice Hall.
Chicago Style (17th ed.) CitationRoberts, Mary Lou, and Paul D. Berger. Direct Marketing Management / Mary Lou Roberts, Paul D. Berger. Prentice Hall, 1989.
MLA (9th ed.) CitationRoberts, Mary Lou, and Paul D. Berger. Direct Marketing Management / Mary Lou Roberts, Paul D. Berger. Prentice Hall, 1989.
Warning: These citations may not always be 100% accurate.