Guffey, M. E., & Loewy, D. (2010). Essentials of business communication (8th ed.). South-Western/Cengage Learning.
Цитирование в стиле Чикаго (17-е изд.)Guffey, Mary Ellen, и Dana Loewy. Essentials of Business Communication. 8th ed. Mason, Ohio: South-Western/Cengage Learning, 2010.
Цитирование MLA (9-е изд.)Guffey, Mary Ellen, и Dana Loewy. Essentials of Business Communication. 8th ed. South-Western/Cengage Learning, 2010.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.