Marga Institute & United States Agency for International Development. The Co-operative system and rural credit in Sri Lanka.
Chicago-viite (17. p.)Marga Institute ja United States Agency for International Development. The Co-operative System and Rural Credit in Sri Lanka. Colombo, Marga Institute, 1974.
MLA-viite (9. p.)Marga Institute ja United States Agency for International Development. The Co-operative System and Rural Credit in Sri Lanka.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.