Pickering, K. T., & Owen, L. A. (1997). An introduction to global environmental issues (2nd ed.). Routledge.
Chicago Style (17. basım) AtıfPickering, Kevin T., ve Lewis A. Owen. An Introduction to Global Environmental Issues. 2nd ed. London: Routledge, 1997.
MLA (9th ed.) AtıfPickering, Kevin T., ve Lewis A. Owen. An Introduction to Global Environmental Issues. 2nd ed. Routledge, 1997.
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