APA (7th ed.) Citation

(1923). Decimal classification of radio subjects, extension of Dewey system. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Decimal Classification of Radio Subjects, Extension of Dewey System. [Washington?]: U.S. Government Printing Office, 1923.

MLA (9th ed.) Citation

Decimal Classification of Radio Subjects, Extension of Dewey System. U.S. Government Printing Office, 1923.