* Charles Bloomberg and Saul Dubow, eds., "Christian–Nationalism and the Rise of the Afrikaner Broederbond in South Africa, 1918–48" (Bloomington: Indiana University Press, 1989).
* Charles Bloomberg and Saul Dubow, eds., "Christian—Nationalism and the Rise of the Afrikaner Broederbond in South Africa, 1918—48" (Bloomington: Indiana University Press, 1989).