APA

Gilson E., . (1940). The spirit of mediaeval philosophie. New York: Scribner's Sons.

Chicago

Gilson Etienne, . 1940. The spirit of mediaeval philosophie. New York: Scribner's Sons.

Harvard

Gilson E., . (1940). The spirit of mediaeval philosophie. New York: Scribner's Sons.

MLA

Gilson Etienne, . The spirit of mediaeval philosophie. New York: Scribner's Sons. 1940.