APA (7th ed.) Citation

Whitehead, A. N. (1925). An enquiry concerning the principles of natural knowledge (2nd ed.). University Press.

Chicago Style (17th ed.) Citation

Whitehead, Alfred North. An Enquiry Concerning the Principles of Natural Knowledge. 2nd ed. Cambridge: University Press, 1925.

MLA (9th ed.) Citation

Whitehead, Alfred North. An Enquiry Concerning the Principles of Natural Knowledge. 2nd ed. University Press, 1925.