Holbert, N. B. (1993). Practical marketing research: An integrated global perspective / Neil Bruce Holbert, Mark W. Speece. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHolbert, Neil Bruce. Practical Marketing Research: An Integrated Global Perspective / Neil Bruce Holbert, Mark W. Speece. New York: Prentice-Hall, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHolbert, Neil Bruce. Practical Marketing Research: An Integrated Global Perspective / Neil Bruce Holbert, Mark W. Speece. Prentice-Hall, 1993.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.