Gaya APA
STELLMAN, J, M.
(1998).
Encyclopedia Of Occupational Health Ang Safety vol.1
(
ed.4)
.
Rak A - G:
Elexmedia.
Gaya MLA
STELLMAN, Jeanne, Mager.
"Encyclopedia Of Occupational Health Ang Safety vol.1".
ed.4
Rak A - G:
Elexmedia,
1998.
Buku.