Butler, E., Hickman, M. A., & Overby, L. (1983). Correct writing (3rd ed.). D.C. Heath and Company.
Cita Chicago Style (17a ed.)Butler, Eugenia, Mary Ann Hickman, y Lalla Overby. Correct Writing. 3rd ed. Lexington: D.C. Heath and Company, 1983.
Cita MLA (9a ed.)Butler, Eugenia, et al. Correct Writing. 3rd ed. D.C. Heath and Company, 1983.
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