APA

Buttrick G. A., . (1942). Prayer. New York: Abingdon-Cokesbury Press.

Chicago

Buttrick George Arthur, . 1942. Prayer. New York: Abingdon-Cokesbury Press.

Harvard

Buttrick G. A., . (1942). Prayer. New York: Abingdon-Cokesbury Press.

MLA

Buttrick George Arthur, . Prayer. New York: Abingdon-Cokesbury Press. 1942.