Stewart, G. R., & Raisz, E. (1953). U.S. 40: Cross section of the United States of America. Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Stewart, George Rippey, agus Erwin Raisz. U.S. 40: Cross Section of the United States of America. Boston, Mass.: Houghton Mifflin, 1953.
Lua MLA (8ú heag.)Stewart, George Rippey, agus Erwin Raisz. U.S. 40: Cross Section of the United States of America. Houghton Mifflin, 1953.
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