Dyfyniad APA

Spiegel, M. R. (2000). Questionnaire design and administration. Brisbane: John Wiley and Sons.

Dyfyniad Arddull Chicago

Spiegel, Murray R. Questionnaire Design and Administration. Brisbane: John Wiley and Sons, 2000.

Dyfyniad MLA

Spiegel, Murray R. Questionnaire Design and Administration. Brisbane: John Wiley and Sons, 2000.

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