Richardson, J. E. (1988). Marketing 88/90. The Dushkin.
Cita Chicago (17th ed.)Richardson, John E. Marketing 88/90. The Dushkin, 1988.
Cita MLA (9th ed.)Richardson, John E. Marketing 88/90. The Dushkin, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.