APA

United States, . (1956). National Conservation Anniversary Commission: hearing, 84th Congress, 2d session, on S.J. Res. 139, June 7, 1956. [Washington, D.C.]: .

Chicago

United States, . 1956. National Conservation Anniversary Commission: hearing, 84th Congress, 2d session, on S.J. Res. 139, June 7, 1956. [Washington, D.C.]: .

Harvard

United States, . (1956). National Conservation Anniversary Commission: hearing, 84th Congress, 2d session, on S.J. Res. 139, June 7, 1956. [Washington, D.C.]: .

MLA

United States, . National Conservation Anniversary Commission: hearing, 84th Congress, 2d session, on S.J. Res. 139, June 7, 1956. [Washington, D.C.]: . 1956.