WilkIns, M. (2017). A closer look at John Day Fossil Beds National Monument. Discover Your Northwest.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilkIns, Megan. A Closer Look at John Day Fossil Beds National Monument. Seattle, Washington: Discover Your Northwest, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWilkIns, Megan. A Closer Look at John Day Fossil Beds National Monument. Discover Your Northwest, 2017.
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