Gaya APA
Encyclopaedia of Occupational Health and Safety vol. 4. (1998).
:
.
Gaya Chicago
Encyclopaedia of Occupational Health and Safety vol. 4.
.
:
,
1998.
Buku Text.
Gaya MLA
Encyclopaedia of Occupational Health and Safety vol. 4.
.
:
,
1998.
Buku Text.
Gaya Turabian
Encyclopaedia of Occupational Health and Safety vol. 4.
:
,
1998.
Buku Text.