Shive, I. (2015). The National Parks: An American legacy : celebrating 100 years of the National Park Service. Earth Aware Editions.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रShive, Ian. The National Parks: An American Legacy : Celebrating 100 Years of the National Park Service. San Rafael, California: Earth Aware Editions, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रShive, Ian. The National Parks: An American Legacy : Celebrating 100 Years of the National Park Service. Earth Aware Editions, 2015.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.