APA (7th ed.) Citation

United States. Federal Board for Vocational Education. (1919). Unit course: Automobile mechanics I, engine repairing, section 1, trial edition. GPO.

Chicago Style (17th ed.) Citation

United States. Federal Board for Vocational Education. Unit Course: Automobile Mechanics I, Engine Repairing, Section 1, Trial Edition. [Washington]: GPO, 1919.

MLA (9th ed.) Citation

United States. Federal Board for Vocational Education. Unit Course: Automobile Mechanics I, Engine Repairing, Section 1, Trial Edition. GPO, 1919.