APA

United States, . (1961). Wilderness Act: hearings, 87th Congress, 1st session, on S. 174, Feb. 27 and 28, 1961. [Washington, D.C.]: .

Chicago

United States, . 1961. Wilderness Act: hearings, 87th Congress, 1st session, on S. 174, Feb. 27 and 28, 1961. [Washington, D.C.]: .

Harvard

United States, . (1961). Wilderness Act: hearings, 87th Congress, 1st session, on S. 174, Feb. 27 and 28, 1961. [Washington, D.C.]: .

MLA

United States, . Wilderness Act: hearings, 87th Congress, 1st session, on S. 174, Feb. 27 and 28, 1961. [Washington, D.C.]: . 1961.