Greenbaum, S., & Quirk, R. (1990). A student's grammar of the english language. Longman.
Chicago Style (17th ed.) ZitazioaGreenbaum, Sidney, eta Randolph Quirk. A Student's Grammar of the English Language. Londres: Longman, 1990.
MLA (9th ed.) ZitazioaGreenbaum, Sidney, eta Randolph Quirk. A Student's Grammar of the English Language. Longman, 1990.
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