APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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