Tull, D. S. (2000). Marketing Research/6e (6th ed.). New Delhi.
Citación estilo ChicagoTull, Donald S. Marketing Research/6e. 6th ed. Prentice Hall: New Delhi, 2000.
Cita MLATull, Donald S. Marketing Research/6e. 6th ed. New Delhi, 2000.
Warning: These citations may not always be 100% accurate.