Schäfer, R. (2007). Climate, Water Supply, Energy and Food: Challenges for the future. Topos.
Style de citation Chicago (17e éd.)Schäfer, Robert. "Climate, Water Supply, Energy and Food: Challenges for the Future." Topos 2007.
Style de citation MLA (8e éd.)Schäfer, Robert. "Climate, Water Supply, Energy and Food: Challenges for the Future." Topos, 2007.
Attention : ces citations peuvent ne pas être correctes à 100%.