Cita APA (7a ed.)

Bayer, F. M., & Owre, H. B. (1968). The free-living lower invertebrates. Macmillan.

Cita Chicago Style (17a ed.)

Bayer, Frederick M., y Harding B. Owre. The Free-living Lower Invertebrates. New York: Macmillan, 1968.

Cita MLA (9a ed.)

Bayer, Frederick M., y Harding B. Owre. The Free-living Lower Invertebrates. Macmillan, 1968.