Não informado. Publications of the Lick Observatory. University of California.
Chicago-referens (17:e uppl.)Não informado. Publications of the Lick Observatory. Sacramento: University of California.
MLA-referens (8:e uppl.)Não informado. Publications of the Lick Observatory. University of California.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.