Não informado. (2022). Report for the Year Ending. South African Astronomical Observatory.
Chicago-referens (17:e uppl.)Não informado. Report for the Year Ending. Cape Town, Africa do Sul: South African Astronomical Observatory, 2022.
MLA-referens (8:e uppl.)Não informado. Report for the Year Ending. South African Astronomical Observatory, 2022.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.