APA (7. basım) Alıntı

(1981). Position classification standard for safety and occupational health management series GS-018.

Chicago Style (17. basım) Atıf

Position Classification Standard for Safety and Occupational Health Management Series GS-018. 1981.

MLA (9th ed.) Atıf

Position Classification Standard for Safety and Occupational Health Management Series GS-018. 1981.

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