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..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited 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.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited 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.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.