Thill, J. V. 2., & Bovee, C. L. 2. (2003). Excellence in business communication: Active book, version 1.0. Upper Saddle River, NJ : Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Thill, John V. 255889, agus Courtland L. 229299 Bovee. Excellence in Business Communication: Active Book, Version 1.0. Upper Saddle River, NJ : Prentice Hall, 2003.
Lua MLA (9ú heag.)Thill, John V. 255889, agus Courtland L. 229299 Bovee. Excellence in Business Communication: Active Book, Version 1.0. Upper Saddle River, NJ : Prentice Hall, 2003.
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