Dyfyniad APA

Trewartha, G. T. (1980). Introduction to climate (5th ed.). Mc Graw Hill International Book company.

Dyfyniad Arddull Chicago

Trewartha, Glenn T. Introduction to Climate. 5th ed. London: Mc Graw Hill International Book company, 1980.

Dyfyniad MLA

Trewartha, Glenn T. Introduction to Climate. 5th ed. Mc Graw Hill International Book company, 1980.

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