Birdsall, S. S., & Florin, J. (1992). Outline of american geography: Regional landscapes of the united states (Fourth edition.). John Wiley.
Цитирование в стиле Чикаго (17-е изд.)Birdsall, Stephen S., и John Florin. Outline of American Geography: Regional Landscapes of the United States. Fourth edition. New York: John Wiley, 1992.
Цитирование MLA (9-е изд.)Birdsall, Stephen S., и John Florin. Outline of American Geography: Regional Landscapes of the United States. Fourth edition. John Wiley, 1992.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.