APA (7th ed.) Citation

United States. Federal Board for Vocational Education. (1930). Directory of trade and industrial schools. GPO.

Chicago Style (17th ed.) Citation

United States. Federal Board for Vocational Education. Directory of Trade and Industrial Schools. [Washington]: GPO, 1930.

MLA (9th ed.) Citation

United States. Federal Board for Vocational Education. Directory of Trade and Industrial Schools. GPO, 1930.