Hungerford, H. R. (1988). An environmental education approach to the training of elementary teacher: A teacher education programme. Unesco Division of Science, Technology and Environmental Education.
Citazione stile Chigago Style (17a edizione)Hungerford, Harold R. An Environmental Education Approach to the Training of Elementary Teacher: A Teacher Education Programme. [Paris]: Unesco Division of Science, Technology and Environmental Education, 1988.
Citatione MLA (9a ed.)Hungerford, Harold R. An Environmental Education Approach to the Training of Elementary Teacher: A Teacher Education Programme. Unesco Division of Science, Technology and Environmental Education, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.