Norback, C. T., & Norback, P. G. (1979). The must words: The 6000 most important words for a successful and profitable vocabulary. McGraw-Hill.
Цитирование в стиле Чикаго (17-е изд.)Norback, Craig T., и Peter G. Norback. The Must Words: The 6000 Most Important Words for a Successful and Profitable Vocabulary. New York: McGraw-Hill, 1979.
Цитирование MLA (8-е изд.)Norback, Craig T., и Peter G. Norback. The Must Words: The 6000 Most Important Words for a Successful and Profitable Vocabulary. McGraw-Hill, 1979.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.