APA (7th ed.) Citation

Schmidt, R. E. (2010). Phases of the moon, 2000-2049 (Update May 2010.). U.S. Naval Observatory.

Chicago Style (17th ed.) Citation

Schmidt, Richard E. Phases of the Moon, 2000-2049. Update May 2010. Washington, D.C.: U.S. Naval Observatory, 2010.

MLA (9th ed.) Citation

Schmidt, Richard E. Phases of the Moon, 2000-2049. Update May 2010. U.S. Naval Observatory, 2010.