APA (7th ed.) Zitazioa

(1919). Elementary thread Cutting / Issued by the Federal board for vocational education in cooperation with the Surgeon general's office and the Bureau of war risk insurance. February, 1919.

Chicago Style (17th ed.) Zitazioa

Elementary Thread Cutting / Issued by the Federal Board for Vocational Education in Cooperation with the Surgeon General's Office and the Bureau of War Risk Insurance. February, 1919. 1919.

MLA (9th ed.) Zitazioa

Elementary Thread Cutting / Issued by the Federal Board for Vocational Education in Cooperation with the Surgeon General's Office and the Bureau of War Risk Insurance. February, 1919. 1919.