APA

Otto J. H., Towle A., . (1977). Modern biology. New York: Holt, Rinehart and Winston.

Chicago

Otto James H, Towle Albert, . 1977. Modern biology. New York: Holt, Rinehart and Winston.

Harvard

Otto J. H., Towle A., . (1977). Modern biology. New York: Holt, Rinehart and Winston.

MLA

Otto James H, Towle Albert, . Modern biology. New York: Holt, Rinehart and Winston. 1977.