APA

United States, . (2004). Implementation of smallpox vaccination plan: hearing before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Eighth Congress, first session, special hearing, January 29, 2003, Washington, DC. Washington: U.S. Government Printing Office.

Chicago

United States, . 2004. Implementation of smallpox vaccination plan: hearing before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Eighth Congress, first session, special hearing, January 29, 2003, Washington, DC. Washington: U.S. Government Printing Office.

Harvard

United States, . (2004). Implementation of smallpox vaccination plan: hearing before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Eighth Congress, first session, special hearing, January 29, 2003, Washington, DC. Washington: U.S. Government Printing Office.

MLA

United States, . Implementation of smallpox vaccination plan: hearing before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Eighth Congress, first session, special hearing, January 29, 2003, Washington, DC. Washington: U.S. Government Printing Office. 2004.