Langan, J. (2003). Sentence skills: A workbook for writers : form A (7th ed.). McGraw-Hill.
Cita Chicago Style (17a ed.)Langan, John. Sentence Skills: A Workbook for Writers : Form A. 7th ed. Boston: McGraw-Hill, 2003.
Cita MLA (8a ed.)Langan, John. Sentence Skills: A Workbook for Writers : Form A. 7th ed. McGraw-Hill, 2003.
Precaución: Estas citas no son 100% exactas.