Cita APA (7th ed.)
Brown, L. O., & Beik, L. L. (1969). Marketing research and analysis (4th ed.). Ronald Press Co..
Cita Chicago (17th ed.)
Brown, Lyndon O., i Leland Larson Beik. Marketing Research and Analysis. 4th ed. New York: Ronald Press Co., 1969.
Cita MLA (9th ed.)
Brown, Lyndon O., i Leland Larson Beik. Marketing Research and Analysis. 4th ed. Ronald Press Co., 1969.
Atenció: Aquestes cites poden no estar 100% correctes.