RUBEY, H., LOMMEL, G. E., & TODD, M. W. (1950). Engineering survey: Elementary.-- Ed.3. The Macmillan Company.
Lua i Stíl Chicago (17ú heag.)RUBEY, Harry, George Edward LOMMEL, agus Marion Wesley TODD. Engineering Survey: Elementary.-- Ed.3. New York: The Macmillan Company, 1950.
Lua MLA (9ú heag.)RUBEY, Harry, et al. Engineering Survey: Elementary.-- Ed.3. The Macmillan Company, 1950.
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