Forrest, K. (2011). Metal that will not bend: National Union of Metalworkers of South Africa 1980-1995. Wits University Press.
Chicago-viite (17. p.)Forrest, Kally. Metal That Will Not Bend: National Union of Metalworkers of South Africa 1980-1995. Johannesburg: Wits University Press, 2011.
MLA-viite (9. p.)Forrest, Kally. Metal That Will Not Bend: National Union of Metalworkers of South Africa 1980-1995. Wits University Press, 2011.
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