Langan, J. (2009). English essentials: What every college student needs to know about grammar, punctuation, and usage. New York: McGraw-Hill Companies,Incorporated.
Čikaški stil citiranjaLangan, John. English Essentials: What Every College Student Needs to Know About Grammar, Punctuation, and Usage. New York: McGraw-Hill Companies,Incorporated, 2009.
MLA način citiranjaLangan, John. English Essentials: What Every College Student Needs to Know About Grammar, Punctuation, and Usage. New York: McGraw-Hill Companies,Incorporated, 2009.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.