Dyfyniad APA

Getis, A., Getis, J., & Fellmann, J. D. (2008). Introduction to geography (11th ed.). Boston: McGraw-Hill Higher Education.

Dyfyniad Arddull Chicago

Getis, Arthur, Judith Getis, and Jerome D. Fellmann. Introduction to Geography. 11th ed. Boston: McGraw-Hill Higher Education, 2008.

Dyfyniad MLA

Getis, Arthur, Judith Getis, and Jerome D. Fellmann. Introduction to Geography. 11th ed. Boston: McGraw-Hill Higher Education, 2008.

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