Langan, J. (2001). Sentence skills with readings (second edition.). McGraw-Hill.
Cita Chicago Style (17a ed.)Langan, John. Sentence Skills with Readings. second edition. Boston: McGraw-Hill, 2001.
Cita MLA (8a ed.)Langan, John. Sentence Skills with Readings. second edition. McGraw-Hill, 2001.
Precaución: Estas citas no son 100% exactas.