APA
U.S.A. Commerce (Department Of-), U.S.A. Commerce (Department Of-), . (1956). Statistical abstract of the United States. : .
Chicago
U.S.A. Commerce (Department Of-), U.S.A. Commerce (Department Of-), . 1956. Statistical abstract of the United States. : .
Harvard
U.S.A. Commerce (Department Of-), U.S.A. Commerce (Department Of-), . (1956). Statistical abstract of the United States. : .
MLA
U.S.A. Commerce (Department Of-), U.S.A. Commerce (Department Of-), . Statistical abstract of the United States. : . 1956.
