Betts, R. B. (1985). In search of York: The slave who went to the Pacific with Lewis and Clark. Colorado Associated University Press.
Цитирование в стиле Чикаго (17-е изд.)Betts, Robert B. In Search of York: The Slave Who Went to the Pacific with Lewis and Clark. Boulder, Colo.: Colorado Associated University Press, 1985.
Цитирование MLA (8-е изд.)Betts, Robert B. In Search of York: The Slave Who Went to the Pacific with Lewis and Clark. Colorado Associated University Press, 1985.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.