Raven, P. H., & Johnson, G. B. (2002). Biology (6th edición.). McGraw - Hill Companies.
Chicago Style (17th ed.) CitationRaven, Peter H., and George B. Johnson. Biology. 6th edición. New york, NY: McGraw - Hill Companies, 2002.
MLA (9th ed.) CitationRaven, Peter H., and George B. Johnson. Biology. 6th edición. McGraw - Hill Companies, 2002.
Warning: These citations may not always be 100% accurate.