APA (7th ed.) Citation

United States. Hydrographic Office. (1902). Sun's apparent declination and equation of time, with hourly differences, for year 1903. GPO.

Chicago Style (17th ed.) Citation

United States. Hydrographic Office. Sun's Apparent Declination and Equation of Time, with Hourly Differences, for Year 1903. [Washington]: GPO, 1902.

MLA (9th ed.) Citation

United States. Hydrographic Office. Sun's Apparent Declination and Equation of Time, with Hourly Differences, for Year 1903. GPO, 1902.