Gaya APA
Ph.D, T, R, W. (1994).
Applications Manual For The Niosh Lifting Equation .
Mexico:
U.S Departement of Commerce Technology Administration National Tecnical Information Service (NTIS).
Gaya MLA
Ph.D, Thomas, R., Waters,.
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Mexico:
U.S Departement of Commerce Technology Administration National Tecnical Information Service (NTIS),
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TUGAS AKHIR.