Dyfyniad APA

Perkins, B., & Perkins, G. B. (1999). The American tradition in literature (9th ed.). Boston, Mass: McGraw-Hill.

Dyfyniad Arddull Chicago

Perkins, Barbara, và George B. Perkins. The American Tradition in Literature. 9th ed. Boston, Mass: McGraw-Hill, 1999.

Dyfyniad MLA

Perkins, Barbara, và George B. Perkins. The American Tradition in Literature. 9th ed. Boston, Mass: McGraw-Hill, 1999.

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