United States. Congress. Senate. Committee on Interior and Insular Affairs. Subcommittee on Parks and Recreation. (1967). The North Cascades: Hearings, Ninetieth Congress, first session. U.S. Govt. Print. Off..
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)United States. Congress. Senate. Committee on Interior and Insular Affairs. Subcommittee on Parks and Recreation. The North Cascades: Hearings, Ninetieth Congress, First Session. Washington: U.S. Govt. Print. Off., 1967.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)United States. Congress. Senate. Committee on Interior and Insular Affairs. Subcommittee on Parks and Recreation. The North Cascades: Hearings, Ninetieth Congress, First Session. U.S. Govt. Print. Off., 1967.
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