External links and sources
More suggestions and sources
Collins, R. J. G. The postage stamps of New Zealand. Vol. 5, The stamps and postal history of the Pacific Islands under New Zealand administration, Samoa and the Ross Dependency. Christchurch, 1967
Gwynn, R. 'New Zealand stamp production comes of age: the contribution of W. R. Bock & A. E. Cousins'. In Catalogue of Palmpex ’82 national stamp exhibition. Palmerston North, 1982.
Stanley, M. Alfred Ernest Cousins. Auckland, 1980