Yoo, William (Personal Name)
American missionaries, Korean Protestants, and the changing shape of world Christianity, 1884-1965, 2016: E-CIP t.p. (William Yoo)
Columbia Theological Seminary website, accessed October 20, 2016: faculty directory (Dr. William Yoo, Assistant Professor of American Religious and Cultural History ; PhD, Emory University ; ThM, Emory University ; MDiv, Westminster Theological Seminary ; Denomination: Presbyterian Church (USA))
Presbyterian Church (U.S.A.). Office of the General Assembly Minister Directory, accessed October 20, 2016 : (William Yoo ; ordained 9/15/2014)