Cita APA (7th ed.)
Weis, H. C. (1981). Marketing. Kiehl.
Cita Chicago (17th ed.)
Weis, Hans Christian. Marketing. Ludwigshafen <Rhein>: Kiehl, 1981.
Cita MLA (9th ed.)
Weis, Hans Christian. Marketing. Kiehl, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.