Lang, K. R. A companion to astronomy and astrophysics: Chronology and glossary with data tables.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLang, Kenneth R. A Companion to Astronomy and Astrophysics: Chronology and Glossary with Data Tables.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLang, Kenneth R. A Companion to Astronomy and Astrophysics: Chronology and Glossary with Data Tables.
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