Langan, J. (2008). Essentials of English: What every college student needs to know about grammar, punctuation, and usage. McGraw-Hill.
Trích dẫn kiểu ChicagoLangan, John. Essentials of English: What Every College Student Needs to Know About Grammar, Punctuation, and Usage. McGraw-Hill, 2008.
MLA citiranjeLangan, John. Essentials of English: What Every College Student Needs to Know About Grammar, Punctuation, and Usage. McGraw-Hill, 2008.
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