Committee on Energy and Comerce. (1989). Hearings before the subcommittee on telecommunications and finance of the committee on energy and commerce house of representatives: One hundred first congress. Washington: Superintendent o Documents, Congressional Sales Office.
Παραπομπή Chicago StyleCommittee on Energy and Comerce. Hearings Before the Subcommittee On Telecommunications and Finance of the Committee On Energy and Commerce House of Representatives: One Hundred First Congress. Washington: Superintendent o Documents, Congressional Sales Office, 1989.
Παραπομπή MLACommittee on Energy and Comerce. Hearings Before the Subcommittee On Telecommunications and Finance of the Committee On Energy and Commerce House of Representatives: One Hundred First Congress. Washington: Superintendent o Documents, Congressional Sales Office, 1989.