(en) A. I. Tomlinson et John Sansom, Temperature Normals for New Zealand for the period 1961 to 1990, Wellington, National Institute of Water and Atmospheric Research, coll. « NIWA Science and Technology Series », (ISSN1173-0382, lire en ligne). Consulté le .
(en) A. I. Tomlinson et John Sansom, Temperature Normals for New Zealand for the period 1961 to 1990, Wellington, National Institute of Water and Atmospheric Research, coll. « NIWA Science and Technology Series », (ISSN1173-0382, lire en ligne). Consulté le .