Não informado. (2022). Report for the Year Ending. South African Astronomical Observatory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Report for the Year Ending. Cape Town, Africa do Sul: South African Astronomical Observatory, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Report for the Year Ending. South African Astronomical Observatory, 2022.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.