Hall, A. L., & Molengraaff, G. A. F. (1925). The Vredefort mountain land in the southern Transvaal and the northern Orange Free State. Koninklijke Akademie van Wetenschappen.
Čikaški stil citiranja (17. izdanje)Hall, A. L., i G. A. F. Molengraaff. The Vredefort Mountain Land in the Southern Transvaal and the Northern Orange Free State. Amsterdam: Koninklijke Akademie van Wetenschappen, 1925.
MLA način citiranja (8. izdanje)Hall, A. L., i G. A. F. Molengraaff. The Vredefort Mountain Land in the Southern Transvaal and the Northern Orange Free State. Koninklijke Akademie van Wetenschappen, 1925.
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