Robbertze, J. H. (1963). Die bruikbaarheid van die begrip telepatie in die psigiatrie =: (The applicability of the concept of telepathy in psychiatry). s.n..
Lua i Stíl Chicago (17ú heag.)Robbertze, Johannes Hendrik. Die Bruikbaarheid Van Die Begrip Telepatie in Die Psigiatrie =: (The Applicability of the Concept of Telepathy in Psychiatry). [S.l.: s.n., 1963.
Lua MLA (8ú heag.)Robbertze, Johannes Hendrik. Die Bruikbaarheid Van Die Begrip Telepatie in Die Psigiatrie =: (The Applicability of the Concept of Telepathy in Psychiatry). s.n., 1963.
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