Cita APA (7a ed.)

U.S.Naval Observatory & Her Majesty's Nautical Almanac Office. (1951). Astronomical phenomena for the year . U.S.Government Printing Office.

Cita Chicago Style (17a ed.)

U.S.Naval Observatory y Her Majesty's Nautical Almanac Office. Astronomical Phenomena for the Year . Washington: U.S.Government Printing Office, 1951.

Cita MLA (9a ed.)

U.S.Naval Observatory y Her Majesty's Nautical Almanac Office. Astronomical Phenomena for the Year . U.S.Government Printing Office, 1951.