Richards, P. (1981). Basic needs, poverty and government policies in Sri Lanka. International Labour Office.
Chicago-referens (17:e uppl.)Richards, Peter. Basic Needs, Poverty and Government Policies in Sri Lanka. Geneva: International Labour Office, 1981.
MLA-referens (9:e uppl.)Richards, Peter. Basic Needs, Poverty and Government Policies in Sri Lanka. International Labour Office, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.