APA (7th ed.) Citation

Roberts, R. B. (1988). Encyclopedia of historic forts: The military, pioneer, and trading posts of the United States. Macmillan.

Chicago Style (17th ed.) Citation

Roberts, Robert B. Encyclopedia of Historic Forts: The Military, Pioneer, and Trading Posts of the United States. New York: Macmillan, 1988.

MLA (9th ed.) Citation

Roberts, Robert B. Encyclopedia of Historic Forts: The Military, Pioneer, and Trading Posts of the United States. Macmillan, 1988.

Warning: These citations may not always be 100% accurate.