APA-čujuhus (7. p.)
Friend, M. A., & Kohn, J. P. (2023). Fundamentals of occupational safety and health (8th ed.). Bernan Press.
Chicago-čujuhus (17. p.)
Friend, Mark A., juo James P. Kohn. Fundamentals of Occupational Safety and Health. 8th ed. Lanham: Bernan Press, 2023.
MLA-čujuhus (9. p.)
Friend, Mark A., juo James P. Kohn. Fundamentals of Occupational Safety and Health. 8th ed. Bernan Press, 2023.
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