APA

United States, . (1971). Oregon Dunes National Recreation Area: hearing before Subcommittee on Parks and Recreation, 92d Congress, 1st session, on S. 1977, Sept. 14, 1971. [Washington, D.C.]: .

Chicago

United States, . 1971. Oregon Dunes National Recreation Area: hearing before Subcommittee on Parks and Recreation, 92d Congress, 1st session, on S. 1977, Sept. 14, 1971. [Washington, D.C.]: .

Harvard

United States, . (1971). Oregon Dunes National Recreation Area: hearing before Subcommittee on Parks and Recreation, 92d Congress, 1st session, on S. 1977, Sept. 14, 1971. [Washington, D.C.]: .

MLA

United States, . Oregon Dunes National Recreation Area: hearing before Subcommittee on Parks and Recreation, 92d Congress, 1st session, on S. 1977, Sept. 14, 1971. [Washington, D.C.]: . 1971.