APA-referens (7:e uppl.)
Verma, V. (2008). Sampling for household-based surveys of child labour. International Labour Organization.
Chicago-referens (17:e uppl.)
Verma, Vijay. Sampling for Household-based Surveys of Child Labour. Geneva: International Labour Organization, 2008.
MLA-referens (9:e uppl.)
Verma, Vijay. Sampling for Household-based Surveys of Child Labour. International Labour Organization, 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.