Francis Wilson, "Minerals and migrants: how the mining industry has shaped South Africa." Daedalus 130.1 (2001): 99-121 online 5 Şubat 2022 tarihinde Wayback Machine sitesinde arşivlendi..
archive.org
Anthony Sampson, The Seven Sisters: The Great Oil Companies and the World They Shaped (1975) online
See Daniel Yergin, The Prize: The Epic Quest for Oil, Money and Power (1991' revised 2009) online
Francis Wilson, "Minerals and migrants: how the mining industry has shaped South Africa." Daedalus 130.1 (2001): 99-121 online 5 Şubat 2022 tarihinde Wayback Machine sitesinde arşivlendi..