Haurongo: Cullen, John
He whakaaturanga anō
Rārangi pukapuka
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Derby, M. The prophet and the policeman: the story of Rua Kenana and John Cullen. Nelson, 2009
Hill, R. S. The iron hand in the velvet glove. Palmerston North, 1995
Obit. Dominion. 28 Oct. 1939: 13
Olssen, E. The Red Feds. Auckland, 1988