Konrad-Adenauer-Stiftung, Thesing, J., & Hofmeister, W. (1996). Environmental protection as an element of order policy. Konrad-Adenauer-Stiftung.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKonrad-Adenauer-Stiftung, Josef Thesing, और Wilhelm Hofmeister. Environmental Protection as an Element of Order Policy. Sankt Augustin: Konrad-Adenauer-Stiftung, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKonrad-Adenauer-Stiftung, et al. Environmental Protection as an Element of Order Policy. Konrad-Adenauer-Stiftung, 1996.
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