1. J. Agar-Hamilton,The Native Policy of the Voortrekkers(Cape Town, 1928), 88.
2. I. Evans,Native Policy in South Africa(London, 1934), 8.
3. D. W. Kruger, Bowes & Bowes,South African Parties and Policies(London, 1960), 362.
4. D. W. Kruger,op. cit., 380.