Petre, M. D. (1896). Aethiopum servus: A study in Christian altruism. Osgood, McIlvaine.
Lua i Stíl Chicago (17ú heag.)Petre, Maude Dominica. Aethiopum Servus: A Study in Christian Altruism. London: Osgood, McIlvaine, 1896.
Lua MLA (8ú heag.)Petre, Maude Dominica. Aethiopum Servus: A Study in Christian Altruism. Osgood, McIlvaine, 1896.
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