Billington, R. A. (1967). Westward expansion : a history of the American frontier / by R.A. Billington: A history of the American frontier (3rd ed.). Macmillan.
Chicago Style (17th ed.) CitationBillington, Ray Allen. Westward Expansion : A History of the American Frontier / by R.A. Billington: A History of the American Frontier. 3rd ed. Macmillan, 1967.
MLA (9th ed.) CitationBillington, Ray Allen. Westward Expansion : A History of the American Frontier / by R.A. Billington: A History of the American Frontier. 3rd ed. Macmillan, 1967.
Warning: These citations may not always be 100% accurate.