Dyfyniad APA
Wellek, R., & Warren, A. (1956). Theory of literature (3rd ed.). Harcourt,Brace&World.
Dyfyniad Arddull Chicago
Wellek, René, and Austin Warren. Theory of Literature. 3rd ed. New York: Harcourt,Brace&World, 1956.
Dyfyniad MLA
Wellek, René, and Austin Warren. Theory of Literature. 3rd ed. Harcourt,Brace&World, 1956.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.