Citazione APA

 Langan, J. (2008).  Essentials of English: What every college student needs to know about grammar, punctuation, and usage.  McGraw-Hill.

Stile di citazione Chicago

 Langan, John.  Essentials of English: What Every College Student Needs to Know About Grammar, Punctuation, and Usage.  McGraw-Hill, 2008.

Citazione MLA

 Langan, John.  Essentials of English: What Every College Student Needs to Know About Grammar, Punctuation, and Usage.  McGraw-Hill, 2008.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.