Langan, J. (2009). Sentence skills: A workbook for writers : form B (8th ed.). McGraw-Hill Higher Education.
Citazione stile Chigago Style (17a edizione)Langan, John. Sentence Skills: A Workbook for Writers : Form B. 8th ed. Boston: McGraw-Hill Higher Education, 2009.
Citatione MLA (9a ed.)Langan, John. Sentence Skills: A Workbook for Writers : Form B. 8th ed. McGraw-Hill Higher Education, 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.