Dyfyniad APA

National Research Council. Panel on Collection. (1981). Collecting data for the estimation of fertility and mortality. National Academy Press.

Dyfyniad Arddull Chicago

National Research Council. Panel on Collection. Collecting Data for the Estimation of Fertility and Mortality. Washington: National Academy Press, 1981.

Dyfyniad MLA

National Research Council. Panel on Collection. Collecting Data for the Estimation of Fertility and Mortality. National Academy Press, 1981.

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