Levy,David H. (2003). David Levy's Guide to Observing and Discovering comets. The Press Syndicate of the university of cambridge.
Chicago Style (17th ed.) CitationLevy,David H. David Levy's Guide to Observing and Discovering Comets. United Kigdom: The Press Syndicate of the university of cambridge, 2003.
MLA (9th ed.) CitationLevy,David H. David Levy's Guide to Observing and Discovering Comets. The Press Syndicate of the university of cambridge, 2003.
Warning: These citations may not always be 100% accurate.