LINK, M. (1981). Outdoor education: A manual for teaching in nature's classroom. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLINK, Michael. Outdoor Education: A Manual for Teaching in Nature's Classroom. New Jersey: Prentice-Hall, 1981.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLINK, Michael. Outdoor Education: A Manual for Teaching in Nature's Classroom. Prentice-Hall, 1981.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.