APA (7th ed.) Citation

United States Naval Observatory. Nautical Almanac Office. (1918). Supplement to American ephemeris, 1918: Total eclipse of Sun, June 8, 1918. GPO.

Chicago Style (17th ed.) Citation

United States Naval Observatory. Nautical Almanac Office. Supplement to American Ephemeris, 1918: Total Eclipse of Sun, June 8, 1918. [Washington]: GPO, 1918.

MLA (9th ed.) Citation

United States Naval Observatory. Nautical Almanac Office. Supplement to American Ephemeris, 1918: Total Eclipse of Sun, June 8, 1918. GPO, 1918.

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