Dyfyniad APA

McCormack, B., & Hill, E. (1997). Conducting a survey: The SPSS workbook. London: International Thomson Press.

Dyfyniad Arddull Chicago

McCormack, Brenda., và Elizabeth Hill. Conducting a Survey: The SPSS Workbook. London: International Thomson Press, 1997.

Dyfyniad MLA

McCormack, Brenda., và Elizabeth Hill. Conducting a Survey: The SPSS Workbook. London: International Thomson Press, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.