More links and websites
This is the official website of the Rātana Church.
More suggestions and sources
Downes, T. W. Early history of Rangitikei, and notes on the Ngati Apa tribe. Wellington, Government Printer, 1910.
McEwen, J. M. Rangitane: a tribal history. Auckland: Heinemann Reed, 1990.
Sinclair, Karen. Prophetic histories: the people of the Māramatanga. Wellington: Bridget Williams Books, 2002.