Martin, G. C., & Wheeler, K. S. (1975). Insights into environmental education. Oliver and Boyd.
Citazione stile Chigago Style (17a edizione)Martin, George Chatwin, e Keith Stracey Wheeler. Insights into Environmental Education. Edinburgh: Oliver and Boyd, 1975.
Citatione MLA (8a ed.)Martin, George Chatwin, e Keith Stracey Wheeler. Insights into Environmental Education. Oliver and Boyd, 1975.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.