Williams, J. M. (2003). Style: Ten lessons in clarity and grace (7th ed.). Longman.
Lua i Stíl Chicago (17ú heag.)Williams, Joseph M. Style: Ten Lessons in Clarity and Grace. 7th ed. New York: Longman, 2003.
Lua MLA (9ú heag.)Williams, Joseph M. Style: Ten Lessons in Clarity and Grace. 7th ed. Longman, 2003.
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