APA

United States, . (2004). Symbols of the U.S. government: Ben's activity book. [Washington, D.C.]: U.S. Government Printing Office.

Chicago

United States, . 2004. Symbols of the U.S. government: Ben's activity book. [Washington, D.C.]: U.S. Government Printing Office.

Harvard

United States, . (2004). Symbols of the U.S. government: Ben's activity book. [Washington, D.C.]: U.S. Government Printing Office.

MLA

United States, . Symbols of the U.S. government: Ben's activity book. [Washington, D.C.]: U.S. Government Printing Office. 2004.