APA

United States, . (1938). Codification of Internal Revenue Laws [in force Jan. 1, 1938]: published pursuant to sec. 1203 (c), Revenue Act of 1926. [Washington, D.C.]: .

Chicago

United States, . 1938. Codification of Internal Revenue Laws [in force Jan. 1, 1938]: published pursuant to sec. 1203 (c), Revenue Act of 1926. [Washington, D.C.]: .

Harvard

United States, . (1938). Codification of Internal Revenue Laws [in force Jan. 1, 1938]: published pursuant to sec. 1203 (c), Revenue Act of 1926. [Washington, D.C.]: .

MLA

United States, . Codification of Internal Revenue Laws [in force Jan. 1, 1938]: published pursuant to sec. 1203 (c), Revenue Act of 1926. [Washington, D.C.]: . 1938.