Dyfyniad APA

James Kirby Martin...[et al.]. (1993). America and its people. New York: HarperCollins College.

Dyfyniad Arddull Chicago

James Kirby Martin...[et al.]. America and Its People. New York: HarperCollins College, 1993.

Dyfyniad MLA

James Kirby Martin...[et al.]. America and Its People. New York: HarperCollins College, 1993.

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