Committee on Commerce, S. (1989). Hearings before the subcommittee on science, technology, and space of the committee on commerce, science, and transportation United States senate: One hundred first congress. Washington: Superintendent o Documents, Congressional Sales Office.
Trích dẫn kiểu ChicagoCommittee on Commerce, Science. Hearings Before the Subcommittee On Science, Technology, and Space of the Committee On Commerce, Science, and Transportation United States Senate: One Hundred First Congress. Washington: Superintendent o Documents, Congressional Sales Office, 1989.
Trích dẫn MLACommittee on Commerce, Science. Hearings Before the Subcommittee On Science, Technology, and Space of the Committee On Commerce, Science, and Transportation United States Senate: One Hundred First Congress. Washington: Superintendent o Documents, Congressional Sales Office, 1989.