APA

Hume D., . (1988). An enquiry concerning human understanding. New York: Prometheus Books.

Chicago

Hume David, . 1988. An enquiry concerning human understanding. New York: Prometheus Books.

Harvard

Hume D., . (1988). An enquiry concerning human understanding. New York: Prometheus Books.

MLA

Hume David, . An enquiry concerning human understanding. New York: Prometheus Books. 1988.