Richards, P. J., & Gooneratne, W. (1980). Basic needs, poverty, and government policies in Sri Lanka. International Labour Office.
Lua i Stíl Chicago (17ú heag.)Richards, P. J., agus Wilbert Gooneratne. Basic Needs, Poverty, and Government Policies in Sri Lanka. Geneva: International Labour Office, 1980.
Lua MLA (8ú heag.)Richards, P. J., agus Wilbert Gooneratne. Basic Needs, Poverty, and Government Policies in Sri Lanka. International Labour Office, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.