APA

United States, . (1939). Codification of Internal Revenue Laws [in force Jan. 2, 1939]: published pursuant to sec. 1203 (c), Revenue Act of 1926. [Washington, D.C.]: .

Chicago

United States, . 1939. Codification of Internal Revenue Laws [in force Jan. 2, 1939]: published pursuant to sec. 1203 (c), Revenue Act of 1926. [Washington, D.C.]: .

Harvard

United States, . (1939). Codification of Internal Revenue Laws [in force Jan. 2, 1939]: published pursuant to sec. 1203 (c), Revenue Act of 1926. [Washington, D.C.]: .

MLA

United States, . Codification of Internal Revenue Laws [in force Jan. 2, 1939]: published pursuant to sec. 1203 (c), Revenue Act of 1926. [Washington, D.C.]: . 1939.