APA

Hume D., . (2004). An enquiry concerning human understanding. New York: Dover Publications.

Chicago

Hume David, . 2004. An enquiry concerning human understanding. New York: Dover Publications.

Harvard

Hume D., . (2004). An enquiry concerning human understanding. New York: Dover Publications.

MLA

Hume David, . An enquiry concerning human understanding. New York: Dover Publications. 2004.