Citazione Stile APA (7a Edizione)

Langan, J., & Johnson, B. (2009). English essentials: What every college student needs to know about grammar, punctuation, and usage (2nd ed., Instructor annotated ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Langan, John, e Beth Johnson. English Essentials: What Every College Student Needs to Know About Grammar, Punctuation, and Usage. 2nd ed., Instructor annotated ed. New York: McGraw-Hill, 2009.

Citatione MLA (9a ed.)

Langan, John, e Beth Johnson. English Essentials: What Every College Student Needs to Know About Grammar, Punctuation, and Usage. 2nd ed., Instructor annotated ed. McGraw-Hill, 2009.