APA
(1955). Annual report of the board of regents of the : Smithsonian institution. Washington, USA: U.S. Government Printing Office.
Chicago
1955. Annual report of the board of regents of the : Smithsonian institution. Washington, USA: U.S. Government Printing Office.
Harvard
(1955). Annual report of the board of regents of the : Smithsonian institution. Washington, USA: U.S. Government Printing Office.
MLA
Annual report of the board of regents of the : Smithsonian institution. Washington, USA: U.S. Government Printing Office. 1955.