APA (7th ed.) Citation
Smith, O. J. (1959). The challenge of missions. STL Books.
Chicago Style (17th ed.) Citation
Smith, Oswald J. The Challenge of Missions. Bromley: STL Books, 1959.
MLA (9th ed.) Citation
Smith, Oswald J. The Challenge of Missions. STL Books, 1959.
Warning: These citations may not always be 100% accurate.