APA (7th ed.) Citation

Duncan, E. M. (1983). Lists of visits of Presidents of the United States to foreign countries, 1789-1983 ([Thirteenth revision.). U.S. Department of State, Office of the Historian.

Chicago Style (17th ed.) Citation

Duncan, Evan M. Lists of Visits of Presidents of the United States to Foreign Countries, 1789-1983. [Thirteenth revision. [Washington, D.C.?]: U.S. Department of State, Office of the Historian, 1983.

MLA (9th ed.) Citation

Duncan, Evan M. Lists of Visits of Presidents of the United States to Foreign Countries, 1789-1983. [Thirteenth revision. U.S. Department of State, Office of the Historian, 1983.