APA (7th ed.) Citation

United States. Weather Bureau. (1915). Mean relative humidity (percentage), July, 8 a.m., 75th meridian time. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Weather Bureau. Mean Relative Humidity (percentage), July, 8 A.m., 75th Meridian Time. Washington: [publisher not identified], 1915.

MLA (9th ed.) Citation

United States. Weather Bureau. Mean Relative Humidity (percentage), July, 8 A.m., 75th Meridian Time. [publisher not identified], 1915.

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