(1991). Environmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEnvironmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEnvironmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman, 1991.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.