APA (7th ed.) Citation

United States. Weather Bureau. (1918). I. Free-air data at Drexel and Ellendale aerological stations, Apr., May, and June 1918; II. Notes on kite flying. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Weather Bureau. I. Free-air Data at Drexel and Ellendale Aerological Stations, Apr., May, and June 1918; II. Notes on Kite Flying. Washington: U.S. GPO, 1918.

MLA (9th ed.) Citation

United States. Weather Bureau. I. Free-air Data at Drexel and Ellendale Aerological Stations, Apr., May, and June 1918; II. Notes on Kite Flying. U.S. GPO, 1918.