Não informado. (2022). Publications of the United States Naval Observatory. Government Printing Office.
Chicago-referens (17:e uppl.)Não informado. Publications of the United States Naval Observatory. Washington: Government Printing Office, 2022.
MLA-referens (8:e uppl.)Não informado. Publications of the United States Naval Observatory. Government Printing Office, 2022.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.