APA-referens (7:e uppl.)

Singapore. Dept. of Statistics. (1980). Singapore standard occupational classification, 1978. Dept. of Statistics.

Chicago-referens (17:e uppl.)

Singapore. Dept. of Statistics. Singapore Standard Occupational Classification, 1978. Singapore: Dept. of Statistics, 1980.

MLA-referens (8:e uppl.)

Singapore. Dept. of Statistics. Singapore Standard Occupational Classification, 1978. Dept. of Statistics, 1980.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.