Kraft, M. E. (2011). Environmental policy and politics (Fifth edition.). Pearson Education, Inc.
Lua i Stíl Chicago (17ú heag.)Kraft, Michael E. Environmental Policy and Politics. Fifth edition. Upper Saddle River, N.J: Pearson Education, Inc, 2011.
Lua MLA (9ú heag.)Kraft, Michael E. Environmental Policy and Politics. Fifth edition. Pearson Education, Inc, 2011.
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