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