Kaufmann, W. J. (1991). Universe (3. ed.). Freeman.
Chicago Style (17th ed.) CitationKaufmann, William J. Universe. 3. ed. New York, NY: Freeman, 1991.
MLA (9th ed.) CitationKaufmann, William J. Universe. 3. ed. Freeman, 1991.
Warning: These citations may not always be 100% accurate.