Holbert, N. B. (1993). Practical marketing research: An integrated global perspective / Neil Bruce Holbert, Mark W. Speece. Prentice-Hall.
Dyfyniad Arddull ChicagoHolbert, Neil Bruce. Practical Marketing Research: An Integrated Global Perspective / Neil Bruce Holbert, Mark W. Speece. New York: Prentice-Hall, 1993.
Dyfyniad MLAHolbert, Neil Bruce. Practical Marketing Research: An Integrated Global Perspective / Neil Bruce Holbert, Mark W. Speece. Prentice-Hall, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.