Dyfyniad APA

Greenland, D. (1977). The Earth In Profile: A physical Geography. Canfield press.

Dyfyniad Arddull Chicago

Greenland, David. The Earth In Profile: A Physical Geography. Sanfrancissco: Canfield press, 1977.

Dyfyniad MLA

Greenland, David. The Earth In Profile: A Physical Geography. Canfield press, 1977.

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