Dyfyniad APA

Booth, J. A., & Walker, T. W. (1989). Understanding Central America. Westview Press.

Dyfyniad Arddull Chicago

Booth, John A., and Thomas W. Walker. Understanding Central America. Boulder, Colo: Westview Press, 1989.

Dyfyniad MLA

Booth, John A., and Thomas W. Walker. Understanding Central America. Westview Press, 1989.

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