Tull, D. S. A. (1988). Research for Marketing Decisions Green, Paul E. International Book House Pvt. Ltd.
Dyfyniad Arddull ChicagoTull, Donalds S; Albaum. Research for Marketing Decisions Green, Paul E. New Delhi: International Book House Pvt. Ltd, 1988.
Dyfyniad MLATull, Donalds S; Albaum. Research for Marketing Decisions Green, Paul E. International Book House Pvt. Ltd, 1988.
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