Hofmeyr, J. H., & Hoernlé, R. F. A. (1945). Christian principles and race problem. South African Institute of Race Relations.
Lua i Stíl Chicago (17ú heag.)Hofmeyr, Jan H., agus Reinhold Frederick Alfred Hoernlé. Christian Principles and Race Problem. Johannesburg: South African Institute of Race Relations, 1945.
Lua MLA (8ú heag.)Hofmeyr, Jan H., agus Reinhold Frederick Alfred Hoernlé. Christian Principles and Race Problem. South African Institute of Race Relations, 1945.
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