Copyright Collection (Library of Congress). (1998). Understanding the universe: An introduction to astronomy.
Chicago Style (17th ed.) CitationCopyright Collection (Library of Congress). Understanding the Universe: An Introduction to Astronomy. 1998.
MLA (9th ed.) CitationCopyright Collection (Library of Congress). Understanding the Universe: An Introduction to Astronomy. 1998.
Warning: These citations may not always be 100% accurate.