APA (7th ed.) Citation

United States. Weather Bureau. (1918). Free-air data at Drexel Aerological Station, July, Aug., Sept., Oct., Nov., and Dec. 1917. GPO.

Chicago Style (17th ed.) Citation

United States. Weather Bureau. Free-air Data at Drexel Aerological Station, July, Aug., Sept., Oct., Nov., and Dec. 1917. [Washington]: GPO, 1918.

MLA (9th ed.) Citation

United States. Weather Bureau. Free-air Data at Drexel Aerological Station, July, Aug., Sept., Oct., Nov., and Dec. 1917. GPO, 1918.

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