Dyfyniad APA

Heer, D. M., & Grigsby, J. S. (1994). Society and population. Prentice hall of Indiaprivate limited.

Dyfyniad Arddull Chicago

Heer, David M., and Jill S. Grigsby. Society and Population. New Delhi: Prentice hall of Indiaprivate limited, 1994.

Dyfyniad MLA

Heer, David M., and Jill S. Grigsby. Society and Population. Prentice hall of Indiaprivate limited, 1994.

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