Possibility :
Lectures delivered before the Philosophical union of the University of California, 1933.

APA Citation

Philosophical Union of the University of California. (1934). Possibility: Lectures delivered before the Philosophical union of the University of California, 1933. Berkeley, Calif.: University of California press.

MLA Citation

Philosophical Union of the University of California. Possibility: Lectures Delivered Before the Philosophical Union of the University of California, 1933. Berkeley, Calif.: University of California press, 1934.