Armstrong, Christopher, David Armstrong, and Mary Armstrong. "William Armstrong." Horn Book 46 (August 1970): 356-358. A short biographical article written by William Armstrong's three children.

Armstrong, William H. "Newbery Acceptance." Horn Book 46 (August 1970): 352-355. Armstrong's acceptance speech, in which he discusses his early reading habits and readers' reactions to Sounder.

Deutsch, Leonard J. "The Named and Unnamed." In Children's Novels and the Movies, edited by Douglas Street.

New York: Ungar Publishing, 1983. An excellent comparison of the novel and film versions of Sounder.

Jordan, June Meyer. "Review." New York Times Book Review (October 26, 1969): 42. A very favorable review of Sounder.

MacCann, Donnarae, and Gloria Woodard, eds. The Black American in Books for Children: Readings in Racism. Metuchen, NJ: Scarecrow Press, 1972. Contains several articles that attack Armstrong's views of black people. The articles by Rae Alexander, Evelyn Geller, and Albert V. Schwartz give negative assessments of the novel.

Townsend...