Dyfyniad APA

Groves, R. M. (2004). Survey errors and survey costs. New Jersey: John Wiley and Sons.

Dyfyniad Arddull Chicago

Groves, Robert M. Survey Errors and Survey Costs. New Jersey: John Wiley and Sons, 2004.

Dyfyniad MLA

Groves, Robert M. Survey Errors and Survey Costs. New Jersey: John Wiley and Sons, 2004.

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