APA

United States, . (2001). Coalbed methane development in Montana: hearing before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Seventh Congress, first session, special hearing, March 10, 2001, Billings, Montana. Washington: U.S. Government Printing Office.

Chicago

United States, . 2001. Coalbed methane development in Montana: hearing before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Seventh Congress, first session, special hearing, March 10, 2001, Billings, Montana. Washington: U.S. Government Printing Office.

Harvard

United States, . (2001). Coalbed methane development in Montana: hearing before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Seventh Congress, first session, special hearing, March 10, 2001, Billings, Montana. Washington: U.S. Government Printing Office.

MLA

United States, . Coalbed methane development in Montana: hearing before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Seventh Congress, first session, special hearing, March 10, 2001, Billings, Montana. Washington: U.S. Government Printing Office. 2001.