Dyfyniad APA

Abler, R. (1975). Human geography in a shrinking world. Duxbury Press.

Dyfyniad Arddull Chicago

Abler, Ronald. Human Geography in a Shrinking World. North Scituate, Mass: Duxbury Press, 1975.

Dyfyniad MLA

Abler, Ronald. Human Geography in a Shrinking World. Duxbury Press, 1975.

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