Langan, J. (2001). Sentence skills with readings (second edition.). McGraw-Hill.
Citazione stile Chigago Style (17a edizione)Langan, John. Sentence Skills with Readings. second edition. Boston: McGraw-Hill, 2001.
Citatione MLA (8a ed.)Langan, John. Sentence Skills with Readings. second edition. McGraw-Hill, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.