Dyfyniad APA

Coggins, R. S., & Hefford, R. K. (1966). The practical geographers (2nd ed.). Longmans.

Dyfyniad Arddull Chicago

Coggins, R. S., and R. K. Hefford. The Practical Geographers. 2nd ed. Victoria: Longmans, 1966.

Dyfyniad MLA

Coggins, R. S., and R. K. Hefford. The Practical Geographers. 2nd ed. Longmans, 1966.

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