Aspects of Islam, 1911 t.p. (Duncan Black Macdonald, M.A., D.D.; sometime scholar and fellow of Univ. of Glasgow; prof. of Semitic languages, Hartford Theological Seminary)
His Allāh, 1979, i.e. 1980 p. 4 (Dunkān Blāk Mākdūnāld)
His Development of Muslim theology ... 1903.
His Development of Muslim theology, jurisprudence, and institutional theory, 1965 t.p (Duncan B. Macdonald)
World biographical index 12, WWW, Dec. 4, 2003 (Macdonald, Duncan Black, 1863- ; educator, author)