Cita APA (7a ed.)

Whitehead, A. N. (1955). An enquiry concerning the principles of natural knowledge. University Press.

Cita Chicago Style (17a ed.)

Whitehead, Alfred North. An Enquiry Concerning the Principles of Natural Knowledge. Cambridge: University Press, 1955.

Cita MLA (9a ed.)

Whitehead, Alfred North. An Enquiry Concerning the Principles of Natural Knowledge. University Press, 1955.