Haurongo: Mackay, Charles Ewing
He whakaaturanga anō
Rārangi pukapuka
The cyclopedia of New Zealand. Vol. 6. Christchurch, 1908
Diamond, P. Downfall: the destruction of Charles Mackay. Auckland, 2022
'Killed while on duty'. New Zealand Herald. 6 May 1929: 11
Parkinson, P. 'The Wanganui affair of 1920'. Pink Triangle No 56 (Nov. 1985): 10–11
'A plea of guilty'. Evening Post. 28 May 1920: 8