Dyfyniad APA

(1983). Regions Of Our Country And Our World Joan Screiber ...[et.al]. Scott, Foresman.

Dyfyniad Arddull Chicago

Regions Of Our Country And Our World Joan Screiber ...[et.al]. Scott, Foresman, 1983.

Dyfyniad MLA

Regions Of Our Country And Our World Joan Screiber ...[et.al]. Scott, Foresman, 1983.

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