APA
Oman J., . (1937). Concerning the ministry. New York: Harper & Brothers.
Chicago
Oman John, . 1937. Concerning the ministry. New York: Harper & Brothers.
Harvard
Oman J., . (1937). Concerning the ministry. New York: Harper & Brothers.
MLA
Oman John, . Concerning the ministry. New York: Harper & Brothers. 1937.