Haurongo: Gilbert, William Herbert Ellery
He whakaaturanga anō
Rārangi pukapuka
Gilbert, H. E. Personal file. N.Z. Defence Force Headquarters, Wellington.
MacDonald, D. ‘It can be lonely on top of the security tree’. Evening Post. 17 July 1976: 8
Obit. New Zealand Herald. 29 Sept. 1987: 9
Parker, M. The SIS. Palmerston North, 1979