APA

United States, . (24). Northern border security: hearings before a Subcommittee of the Committee on Appropriations, United States Senate, One Hundred Seventh Congress, first session, special hearing, October 3, 2001, Washington, DC, December 5, 2001, Washington, DC. Washington: U.S. G.P.O.

Chicago

United States, . 24. Northern border security: hearings before a Subcommittee of the Committee on Appropriations, United States Senate, One Hundred Seventh Congress, first session, special hearing, October 3, 2001, Washington, DC, December 5, 2001, Washington, DC. Washington: U.S. G.P.O.

Harvard

United States, . (24). Northern border security: hearings before a Subcommittee of the Committee on Appropriations, United States Senate, One Hundred Seventh Congress, first session, special hearing, October 3, 2001, Washington, DC, December 5, 2001, Washington, DC. Washington: U.S. G.P.O.

MLA

United States, . Northern border security: hearings before a Subcommittee of the Committee on Appropriations, United States Senate, One Hundred Seventh Congress, first session, special hearing, October 3, 2001, Washington, DC, December 5, 2001, Washington, DC. Washington: U.S. G.P.O. 24.