Cita APA

Otto, J. H., & Towle, A. (1973). Modern Biology. Richard and winston.

Chicago Edition Citation

Otto, James H., i Alert Towle. Modern Biology. Holt: Richard and winston, 1973.

Cita MLA

Otto, James H., i Alert Towle. Modern Biology. Richard and winston, 1973.

Atenció: Aquestes cites poden no estar 100% correctes.