Gaya APA
Asfahl, C.Ray. (2010).
Industrial Safety and Health Management (6).
New Jersey:
Prentice Hall.
Gaya Chicago
Asfahl, C.Ray.
Industrial Safety and Health Management.
6
New Jersey:
Prentice Hall,
2010.
Text.
Gaya MLA
Asfahl, C.Ray.
Industrial Safety and Health Management.
6
New Jersey:
Prentice Hall,
2010.
Text.
Gaya Turabian
Asfahl, C.Ray.
Industrial Safety and Health Management.
6
New Jersey:
Prentice Hall,
2010.
Print.