Gaya APA
Asfahl,C.Ray, ., W, R.
(2010).
Industrial safety and health management
(
6th.Ed)
.
Boston:
Pearson.
Gaya MLA
Asfahl,C.Ray, ., W, Rieske,David.
"Industrial safety and health management".
6th.Ed
Boston:
Pearson,
2010.
Text.