Holtze, Sally Holmes, ed. Sixth Book of Junior Authors and Illustrators. New York: H. W. Wilson, 1989. Includes comments by Newton on her life and writing as well as a portrait.

Marowski, Daniel, ed. Contemporary Literary Criticism. Vol. 35. Detroit: Gale Research, 1985. Contains abstracts and complete reviews of her work through 1985 from periodicals such as School Library Journal, Kirkus Reviews, and The New York Times Book Review. Also includes a portrait.

Metzger, Linda, ed. Contemporary Authors. New Revision Series. Vol. 14.

Detroit: Gale, 1985. Gives a brief overview of Newton's personal life and career, lists works and honors, and provides a few comments from Newton on her writing.

Ward, Martha E., ed. Authors of Books for Young People. 3d ed. Metuchen, NJ: Scarecrow, 1990. Includes brief biographical information.