Cita APA (7th ed.)

Richards, R. A. (2016). Biological classification: A philosophical introduction. Cambridge University Press.

Cita Chicago (17th ed.)

Richards, Richard A. Biological Classification: A Philosophical Introduction. Cambridge: Cambridge University Press, 2016.

Cita MLA (9th ed.)

Richards, Richard A. Biological Classification: A Philosophical Introduction. Cambridge University Press, 2016.