Dyfyniad APA
Alreck, P. L., & Settle, R. B. (1995). The survey research handbook (2nd ed.). IRWIN.
Dyfyniad Arddull Chicago
Alreck, Pamela L., and Robert B. Settle. The Survey Research Handbook. 2nd ed. Chicago: IRWIN, 1995.
Dyfyniad MLA
Alreck, Pamela L., and Robert B. Settle. The Survey Research Handbook. 2nd ed. IRWIN, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.