Cunningham, A. M. (1982). The Ballinger papers: Being the papers of Margaret and William Ballinger. Library, University of the Witwatersrand.
Chicago-referens (17:e uppl.)Cunningham, Anna M. The Ballinger Papers: Being the Papers of Margaret and William Ballinger. Johannesburg: Library, University of the Witwatersrand, 1982.
MLA-referens (8:e uppl.)Cunningham, Anna M. The Ballinger Papers: Being the Papers of Margaret and William Ballinger. Library, University of the Witwatersrand, 1982.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.