Dyfyniad APA

Trewartha, G. T. (1968). introduction to climate (4th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Trewartha, Glenn T. Introduction to Climate. 4th ed. Tokyo: McGraw-Hill, 1968.

Dyfyniad MLA

Trewartha, Glenn T. Introduction to Climate. 4th ed. McGraw-Hill, 1968.

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