Dyfyniad APA
Rand McNally and Company. (1981). Historical atlas of the world. Houghton Mifflin Co..
Dyfyniad Arddull Chicago
Rand McNally and Company. Historical Atlas of the World. Chicago: Houghton Mifflin Co., 1981.
Dyfyniad MLA
Rand McNally and Company. Historical Atlas of the World. Houghton Mifflin Co., 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.