Dyfyniad APA

Winston, B. J. (1991). Geography: Our country and our world. Scott, Foresman and Co..

Dyfyniad Arddull Chicago

Winston, Barbara J. Geography: Our Country and Our World. Glenview: Scott, Foresman and Co., 1991.

Dyfyniad MLA

Winston, Barbara J. Geography: Our Country and Our World. Scott, Foresman and Co., 1991.

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