Cita APA (7th ed.)

Wentz, C. A. (1999). Safety, Health, and environmental protection. McGraw-Hill.

Cita Chicago (17th ed.)

Wentz, Charles A. Safety, Health, and Environmental Protection. Boston, Mass.: McGraw-Hill, 1999.

Cita MLA (9th ed.)

Wentz, Charles A. Safety, Health, and Environmental Protection. McGraw-Hill, 1999.