Gaya APA
GOETSCH, D, L, . (2005).
Occupational Safety and Health for Technologists, Engineers, and Managers 6ed (6).
New Jersey:
Prentice Hall.
Gaya MLA
GOETSCH, David, L, .
"Occupational Safety and Health for Technologists, Engineers, and Managers 6ed".
6
New Jersey:
Prentice Hall,
2005.
Printed.