Bear, Christopher (2017-03-06), "Socio-Nature", in Richardson, Douglas; Castree, Noel; Goodchild, Michael F.; Kobayashi, Audrey (eds.), International Encyclopedia of Geography: People, the Earth, Environment and Technology, Oxford, UK: John Wiley & Sons, Ltd, pp. 1–5, doi:10.1002/9781118786352.wbieg0212, ISBN978-0-470-65963-2, retrieved 2021-08-06
Bear, Christopher (2017-03-06), "Socio-Nature", in Richardson, Douglas; Castree, Noel; Goodchild, Michael F.; Kobayashi, Audrey (eds.), International Encyclopedia of Geography: People, the Earth, Environment and Technology, Oxford, UK: John Wiley & Sons, Ltd, pp. 1–5, doi:10.1002/9781118786352.wbieg0212, ISBN978-0-470-65963-2, retrieved 2021-08-06