Grove, G. A., & Parkhurst, C. C. (1939). English elements and principles (Rev. ed.). Prentice-Hall, Inc.
Lua i Stíl Chicago (17ú heag.)Grove, Glen Arnold, agus Charles Chandler Parkhurst. English Elements and Principles. Rev. ed. New York, Chicago [etc.]: Prentice-Hall, Inc, 1939.
Lua MLA (8ú heag.)Grove, Glen Arnold, agus Charles Chandler Parkhurst. English Elements and Principles. Rev. ed. Prentice-Hall, Inc, 1939.
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