The conditions of knowing :
an essay towards a theory of knowledge /
by Angus Sinclair.

APA Citation

Sinclair, A. (1951). The conditions of knowing: an essay towards a theory of knowledge. London: Routledge & K. Paul.

MLA Citation

Sinclair, Angus, 1905-1954. The Conditions of Knowing: an Essay Towards a Theory of Knowledge. London: Routledge & K. Paul, 1951.

Warning: These citations may not always be complete (especially for serials).