APA (7th ed.) Citation

Hopkins, C. H. (1951). History of the Y. M. C. A. in North America. Association Pr.

Chicago Style (17th ed.) Citation

Hopkins, Charles H. History of the Y. M. C. A. in North America. New York: Association Pr, 1951.

MLA (9th ed.) Citation

Hopkins, Charles H. History of the Y. M. C. A. in North America. Association Pr, 1951.