Dyfyniad APA

Burke, W. J., & Howe, W. D. (1972). American authors and books, 1640 to the present day (3rd rev. ed.). Crown Publishers.

Dyfyniad Arddull Chicago

Burke, William Jeremiah, and Will David Howe. American Authors and Books, 1640 to the Present Day. 3rd rev. ed. New York: Crown Publishers, 1972.

Dyfyniad MLA

Burke, William Jeremiah, and Will David Howe. American Authors and Books, 1640 to the Present Day. 3rd rev. ed. Crown Publishers, 1972.

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