South African Committee for Stratigraphy. (1989). Chronostratigraphic series. Republic of South Africa, Dept. of Mineral and Energy Affairs, Geological Survey.
Citace podle Chicago (17th ed.)South African Committee for Stratigraphy. Chronostratigraphic Series. Pretoria: Republic of South Africa, Dept. of Mineral and Energy Affairs, Geological Survey, 1989.
Citace podle MLA (8th ed.)South African Committee for Stratigraphy. Chronostratigraphic Series. Republic of South Africa, Dept. of Mineral and Energy Affairs, Geological Survey, 1989.
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