1. Anonymous. Westelike Provinsie Vrugtena vorsingstasic Verbouing van tee. Die Landbouweekblad25. April 20, 1952.
2. -. Nuwe toekoms van rooibostee. Die Landbouweekblad21. March 4, 1958.
3. -. Caffeine. The British Pharmaceutical Codex 234–236, ed.1934: 111–113, ed. 1959.
4. -. So Word Rooibostee Gemaak. Die Landbouweekblad37. June 30, 1959.
5. -. Rooibos Tea Control Board Official Yearbook of South Africa No. 30:449. 1960.