Hungerford, H. R., & Litherland, R. A. (1975). Teacher's Guide to Modules 1, 2, 3, 4, and 5 of the Process Modules for Investigating Environmental Problems.
Style de citation Chicago (17e éd.)Hungerford, Harold R., et Ralph A. Litherland. Teacher's Guide to Modules 1, 2, 3, 4, and 5 of the Process Modules for Investigating Environmental Problems. 1975.
Style de citation MLA (9e éd.)Hungerford, Harold R., et Ralph A. Litherland. Teacher's Guide to Modules 1, 2, 3, 4, and 5 of the Process Modules for Investigating Environmental Problems. 1975.
Attention : ces citations peuvent ne pas être correctes à 100%.