The American ephemeris and nautical almanac.
APA Citation
United States Naval Observatory. Nautical Almanac Office. (18551980). The American ephemeris and nautical almanac. Washington, D.C.: U.S. G.P.O..
MLA Citation
United States Naval Observatory. Nautical Almanac Office. The American Ephemeris And Nautical Almanac. Washington, D.C.: U.S. G.P.O., 18551980.
Warning: These citations may not always be complete (especially for serials).