APA

United States, . (1963). National Wilderness Preservation Act: hearings, 86th Congress, 1st session, on S. 4, Feb. 28 and Mar. 1, 1963. [Washington, D.C.]: .

Chicago

United States, . 1963. National Wilderness Preservation Act: hearings, 86th Congress, 1st session, on S. 4, Feb. 28 and Mar. 1, 1963. [Washington, D.C.]: .

Harvard

United States, . (1963). National Wilderness Preservation Act: hearings, 86th Congress, 1st session, on S. 4, Feb. 28 and Mar. 1, 1963. [Washington, D.C.]: .

MLA

United States, . National Wilderness Preservation Act: hearings, 86th Congress, 1st session, on S. 4, Feb. 28 and Mar. 1, 1963. [Washington, D.C.]: . 1963.