Yogerst, J. R. (2017). 50 states, 5,000 ideas: Where to go, when to go, what to see, what to do. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रYogerst, Joseph R. 50 States, 5,000 Ideas: Where to Go, When to Go, What to See, What to Do. Washington, D.C.: National Geographic, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रYogerst, Joseph R. 50 States, 5,000 Ideas: Where to Go, When to Go, What to See, What to Do. National Geographic, 2017.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.