Cita APA (7a ed.)

Allen, C., Bekoff, M., & Lauder, G. V. (1998). Nature's purposes: Analyses of function and design in biology. MIT.

Cita Chicago Style (17a ed.)

Allen, Colin, Marc Bekoff, y George V. Lauder. Nature's Purposes: Analyses of Function and Design in Biology. Cambridge (Massachusetts) [etc.]: MIT, 1998.

Cita MLA (9a ed.)

Allen, Colin, et al. Nature's Purposes: Analyses of Function and Design in Biology. MIT, 1998.