APA Style
International standard classification of occupatio. (1990).
Geneva:
ILO.
Chicago Style
International standard classification of occupatio.
.
Geneva:
ILO,
1990.
.
MLA Style
International standard classification of occupatio.
.
Geneva:
ILO,
1990.
.
Turabian Style
International standard classification of occupatio.
Geneva:
ILO,
1990.
.