U.S. Coast and Geodetic Survey, Heck, N. H., Wood, H. O., & Allen, M. W. (1938). Earthquake history of the United States. U.S. Govt. Print. Off..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रU.S. Coast and Geodetic Survey, N. H. Heck, Harry O. Wood, और Maxwell W. Allen. Earthquake History of the United States. Washington: U.S. Govt. Print. Off., 1938.
एमएलए (8वां संस्करण) प्रशस्ति पत्रU.S. Coast and Geodetic Survey, et al. Earthquake History of the United States. U.S. Govt. Print. Off., 1938.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.