Haurongo: Rex, Helmut Herbert Hermann
He whakaaturanga anō
Rārangi pukapuka
Breward, I. Grace and truth. Dunedin, 1975
Moore, A. C. & M. E. Andrew, eds. A book of Helmut Rex. [Dunedin], 1980
Obit. Otago Daily Times. 18 March 1967: 3
Obit. Theological Review (Dunedin). 1967: 3–6