Biller, D., & Nabi, I. (2013). Investing in infrastructure harnessing its potential for economic growth in Sri Lanka. World Bank.
Chicago-viite (17. p.)Biller, Dan, ja Ijaz Nabi. Investing in Infrastructure Harnessing Its Potential for Economic Growth in Sri Lanka. Washington, D.C.: World Bank, 2013.
MLA-viite (9. p.)Biller, Dan, ja Ijaz Nabi. Investing in Infrastructure Harnessing Its Potential for Economic Growth in Sri Lanka. World Bank, 2013.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.