Williams, P. R. C. (1979). Planning teacher demand and supply. UNESCO, International Institute for Educational Planning.
Citazione stile Chigago Style (17a edizione)Williams, Peter R. C. Planning Teacher Demand and Supply. Paris: UNESCO, International Institute for Educational Planning, 1979.
Citatione MLA (9a ed.)Williams, Peter R. C. Planning Teacher Demand and Supply. UNESCO, International Institute for Educational Planning, 1979.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.