VEIT, R. (1986). Discovering English Grammer Richard Viet. Houghton Mifflin Company.
Lua i Stíl Chicago (17ú heag.)VEIT, Richard. Discovering English Grammer Richard Viet. Houghton Mifflin Company, 1986.
Lua MLA (8ú heag.)VEIT, Richard. Discovering English Grammer Richard Viet. Houghton Mifflin Company, 1986.
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