APA

United States, . (1949). National resources policy: hearings, 81st Congress, 1st session, Jan. 31-Feb. 7, 1949. [Washington, D.C.]: .

Chicago

United States, . 1949. National resources policy: hearings, 81st Congress, 1st session, Jan. 31-Feb. 7, 1949. [Washington, D.C.]: .

Harvard

United States, . (1949). National resources policy: hearings, 81st Congress, 1st session, Jan. 31-Feb. 7, 1949. [Washington, D.C.]: .

MLA

United States, . National resources policy: hearings, 81st Congress, 1st session, Jan. 31-Feb. 7, 1949. [Washington, D.C.]: . 1949.