PRIDE, W. M. (1993). Business / William Pride. Houghton Mifflin Company.
Lua i Stíl Chicago (17ú heag.)PRIDE, William M. Business / William Pride. Houghton Mifflin Company, 1993.
Lua MLA (8ú heag.)PRIDE, William M. Business / William Pride. Houghton Mifflin Company, 1993.
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