Frost, J. R. (1990). Wetlands preservation: An information & action guide. Washington State Dept. of Ecology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFrost, Jane Rubey. Wetlands Preservation: An Information & Action Guide. [Olympia, Wash.]: Washington State Dept. of Ecology, 1990.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFrost, Jane Rubey. Wetlands Preservation: An Information & Action Guide. Washington State Dept. of Ecology, 1990.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.