APA (7th ed.) Zitazioa
U.S. Department of Labor. Bureau of Labor Standards. (1964). Employment Certificates-help you, help youth. U.S.Department of Labor.
Chicago Style (17th ed.) Zitazioa
U.S. Department of Labor. Bureau of Labor Standards. Employment Certificates-help You, Help Youth. Washington: U.S.Department of Labor, 1964.
MLA (9th ed.) Zitazioa
U.S. Department of Labor. Bureau of Labor Standards. Employment Certificates-help You, Help Youth. U.S.Department of Labor, 1964.
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