More links and websites
More suggestions and sources
Cody, J. F. Man of two worlds: a biography of Sir Maui Pomare. Wellington: A.H. & A.W. Reed, 1953.
Cox, Lindsay. Kotahitanga: the search for Maori political unity. Auckland: Oxford University Press, 1993.
Newman, Keith. Ratana revisited: an unfinished legacy. Auckland: Raupo Publishing, 2006.
Walker, Ranginui. He tipua: the life and times of Sir Āpirana Ngata. Auckland: Viking Press/Penguin Books, 2001.