APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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

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