Don S. Armentrout, Robert Boak Slocum: An Episcopal Dictionary of the Church: Evangelical, Church Publishing Incorporated, New York, 2000, pp. 192-193. Gearchiveerd op 18 december 2021.
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Don S. Armentrout, Robert Boak Slocum: An Episcopal Dictionary of the Church: Evangelical, Church Publishing Incorporated, New York, 2000, pp. 192-193. Gearchiveerd op 18 december 2021.