Jain, P. C. (1989). Marketing research management, Vol.1.
Dyfyniad Arddull ChicagoJain, P C. Marketing Research Management, Vol.1. Akashdeep Publishing House: New Delhi, 1989.
Dyfyniad MLAJain, P C. Marketing Research Management, Vol.1. 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.