Langan, J. (201). Exploring writing: Paragraphs and essays. New York : McGraw-Hill.
芝加哥风格引文Langan, John. Exploring Writing: Paragraphs and Essays. New York : McGraw-Hill, 201.
MLA引文Langan, John. Exploring Writing: Paragraphs and Essays. New York : McGraw-Hill, 201.
警告：这些引文格式不一定是100％准确.