Dyfyniad APA

Valliant, R., & Dever, J. A. (2018). Survey weights: A step-by-step guide to calculation. Stata Press.

Dyfyniad Arddull Chicago

Valliant, Richard, and Jill A. Dever. Survey Weights: A Step-by-step Guide to Calculation. Texas: Stata Press, 2018.

Dyfyniad MLA

Valliant, Richard, and Jill A. Dever. Survey Weights: A Step-by-step Guide to Calculation. Stata Press, 2018.

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