Preez, P. J. d., & Bredenkamp, G. J. (1991). Vegetation classes of the southern and eastern Orange Free State (Republic of South Africa) and the highlands of Lesotho. Nasionale Museum.
Chicago-Zitierstil (17. Ausg.)Preez, P. J. du, und G. J. Bredenkamp. Vegetation Classes of the Southern and Eastern Orange Free State (Republic of South Africa) and the Highlands of Lesotho. Bloemfontein: Nasionale Museum, 1991.
MLA-Zitierstil (9. Ausg.)Preez, P. J. du, und G. J. Bredenkamp. Vegetation Classes of the Southern and Eastern Orange Free State (Republic of South Africa) and the Highlands of Lesotho. Nasionale Museum, 1991.
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