Dyfyniad APA
Green, P. E., & Tull, D. S. (1975). Research for marketing decisions (3rd ed.). Prentice-hall.
Dyfyniad Arddull Chicago
Green, Paul E., and Donald S. Tull. Research for Marketing Decisions. 3rd ed. New Jersey: Prentice-hall, 1975.
Dyfyniad MLA
Green, Paul E., and Donald S. Tull. Research for Marketing Decisions. 3rd ed. Prentice-hall, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.