Dyfyniad APA

WENTZ, C. A. (1998). Safety, health, and environmental protection. McGraw-Hill.

Dyfyniad Arddull Chicago

WENTZ, Charles A. Safety, Health, and Environmental Protection. Boston: McGraw-Hill, 1998.

Dyfyniad MLA

WENTZ, Charles A. Safety, Health, and Environmental Protection. McGraw-Hill, 1998.

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