APA

Barker L. F., . (1942). Time and the physician. New York: G.P. Putnam's Sons.

Chicago

Barker Lewellys F, . 1942. Time and the physician. New York: G.P. Putnam's Sons.

Harvard

Barker L. F., . (1942). Time and the physician. New York: G.P. Putnam's Sons.

MLA

Barker Lewellys F, . Time and the physician. New York: G.P. Putnam's Sons. 1942.