Dyfyniad APA

Esselte kartor (Firm), Graphic Learning Corporation, & Lidman Production. (1987). Earth book world atlas. Graphic Learning International Pub.

Dyfyniad Arddull Chicago

Esselte kartor (Firm), Graphic Learning Corporation, and Lidman Production. Earth Book World Atlas. Boulder, Colo: Graphic Learning International Pub, 1987.

Dyfyniad MLA

Esselte kartor (Firm), et al. Earth Book World Atlas. Graphic Learning International Pub, 1987.

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