Adam Kok II, Griqua chief, dies at the Berg River

Kruger, D.W. (ed) (1972). Dictionary of South African Biography, Cape Town: Human Sciences Research Council, v. 4, p. 286|

Potgieter, D.J. et al. (eds) (1970). Standard Encyclopaedia of Southern Africa, Cape Town: NASOU, v.6, p. 430.