(1991). Preventing ozone depletion: Hearing before the Subcommittee on Environmental Protection of the Committee on Environment and Public Works, United States Senate, One Hundred Second Congress, first session, June 11, 1991.
Citace podle Chicago (17th ed.)Preventing Ozone Depletion: Hearing Before the Subcommittee on Environmental Protection of the Committee on Environment and Public Works, United States Senate, One Hundred Second Congress, First Session, June 11, 1991. 1991.
Citace podle MLA (9th ed.)Preventing Ozone Depletion: Hearing Before the Subcommittee on Environmental Protection of the Committee on Environment and Public Works, United States Senate, One Hundred Second Congress, First Session, June 11, 1991. 1991.
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