Citazione Stile APA (7a Edizione)

Langan, J. (2003). Sentence skills: A workbook for writers : form A (7th ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Langan, John. Sentence Skills: A Workbook for Writers : Form A. 7th ed. Boston: McGraw-Hill, 2003.

Citatione MLA (8a ed.)

Langan, John. Sentence Skills: A Workbook for Writers : Form A. 7th ed. McGraw-Hill, 2003.