APA

Otto J. H., . (1981). Modern Biology. New York: Holt,Rinehart and Winston.

Chicago

Otto James H, . 1981. Modern Biology. New York: Holt,Rinehart and Winston.

Harvard

Otto J. H., . (1981). Modern Biology. New York: Holt,Rinehart and Winston.

MLA

Otto James H, . Modern Biology. New York: Holt,Rinehart and Winston. 1981.