Dyfyniad APA

Boyce, R. R. (1978). The bases of economic geography (2nd ed.). Holt, Rinehart and Winston.

Dyfyniad Arddull Chicago

Boyce, Ronald R. The Bases of Economic Geography. 2nd ed. New York: Holt, Rinehart and Winston, 1978.

Dyfyniad MLA

Boyce, Ronald R. The Bases of Economic Geography. 2nd ed. Holt, Rinehart and Winston, 1978.

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