Littlefield, D. J. (1968). Twentieth century interpretations of the Frogs: A collection of critical essays.
Chicago Edition CitationLittlefield, David J. Twentieth Century Interpretations of the Frogs: A Collection of Critical Essays. New Jersey, Prentice Hall, 1968.
MLA Edition CitationLittlefield, David J. Twentieth Century Interpretations of the Frogs: A Collection of Critical Essays. 1968.
Warning: These citations may not always be 100% accurate.