U.S.Department of Labor. (1959). Hazardous employment: Prohibited for minors under state child-labor laws. U.S.Department of Labor.
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Chicago Style (17th ed.) Zitazioa
U.S.Department of Labor. Hazardous Employment: Prohibited for Minors Under State Child-labor Laws. [Washington]: U.S.Department of Labor, 1959.
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MLA (9th ed.) Zitazioa
U.S.Department of Labor. Hazardous Employment: Prohibited for Minors Under State Child-labor Laws. U.S.Department of Labor, 1959.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.