Tohutoro APA (7th ed.)
Friend, M. A., & Kohn, J. P. (2014). Fundamentals of occupational safety and health (Sixth edition.). Bernan Press.
Tohutoru Kātū Chicago (17th ed.)
Friend, Mark A., me James P. Kohn. Fundamentals of Occupational Safety and Health. Sixth edition. Lanham, Maryland: Bernan Press, 2014.
Tohutoro MLA (9th ed.)
Friend, Mark A., me James P. Kohn. Fundamentals of Occupational Safety and Health. Sixth edition. Bernan Press, 2014.
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