APA

United States, . (1950). Nomination of Oscar L. Chapman to be Secretary of Interior: hearing, 81st Congress, 2d session, Jan. 16, 1950. [Washington, D.C.]: .

Chicago

United States, . 1950. Nomination of Oscar L. Chapman to be Secretary of Interior: hearing, 81st Congress, 2d session, Jan. 16, 1950. [Washington, D.C.]: .

Harvard

United States, . (1950). Nomination of Oscar L. Chapman to be Secretary of Interior: hearing, 81st Congress, 2d session, Jan. 16, 1950. [Washington, D.C.]: .

MLA

United States, . Nomination of Oscar L. Chapman to be Secretary of Interior: hearing, 81st Congress, 2d session, Jan. 16, 1950. [Washington, D.C.]: . 1950.