APA
(1999). Ecology :Principles and applications. New York: J.L.Chapman,M.A., Ph.D.
Chicago
1999. Ecology :Principles and applications. New York: J.L.Chapman,M.A., Ph.D.
Harvard
(1999). Ecology :Principles and applications. New York: J.L.Chapman,M.A., Ph.D.
MLA
Ecology :Principles and applications. New York: J.L.Chapman,M.A., Ph.D. 1999.