An enquiry concerning the principles of natural knowledge,
APA Citation
Whitehead, A. North. (1925). An enquiry concerning the principles of natural knowledge. Cambridge: University press.
MLA Citation
Whitehead, Alfred North, 1861-1947. An Enquiry Concerning the Principles of Natural Knowledge. Cambridge: University press, 1925.
Warning: These citations may not always be complete (especially for serials).