Cunningham, A. M. (1982). The Ballinger papers: Being the papers of Margaret and William Ballinger. Library, University of the Witwatersrand.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCunningham, Anna M. The Ballinger Papers: Being the Papers of Margaret and William Ballinger. Johannesburg: Library, University of the Witwatersrand, 1982.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCunningham, Anna M. The Ballinger Papers: Being the Papers of Margaret and William Ballinger. Library, University of the Witwatersrand, 1982.
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