Dyfyniad APA

Lancaster, H. (1990). Expectations of life: A study in the demography, statistics, and history of world mortality. Springer-verlag.

Dyfyniad Arddull Chicago

Lancaster, H.O. Expectations of Life: A Study in the Demography, Statistics, and History of World Mortality. New York: Springer-verlag, 1990.

Dyfyniad MLA

Lancaster, H.O. Expectations of Life: A Study in the Demography, Statistics, and History of World Mortality. Springer-verlag, 1990.

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