Grobbelaar, C. S. (1952). The distribution of and correlation between eye, hair, and skin colour in male students at the University of Stellenbosch. [University of Stellenbosch].
Lua i Stíl Chicago (17ú heag.)Grobbelaar, C. S. The Distribution of and Correlation Between Eye, Hair, and Skin Colour in Male Students at the University of Stellenbosch. Stellenbosch: [University of Stellenbosch], 1952.
Lua MLA (8ú heag.)Grobbelaar, C. S. The Distribution of and Correlation Between Eye, Hair, and Skin Colour in Male Students at the University of Stellenbosch. [University of Stellenbosch], 1952.
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