Lua APA (7ú heag.)

Oum, T. H. (1990). A survey of recent estimates of price elasticities of demand for transport. Infrastructure and Urban Development Department, World Bank.

Lua i Stíl Chicago (17ú heag.)

Oum, Tae H. A Survey of Recent Estimates of Price Elasticities of Demand for Transport. Washington, D.C: Infrastructure and Urban Development Department, World Bank, 1990.

Lua MLA (9ú heag.)

Oum, Tae H. A Survey of Recent Estimates of Price Elasticities of Demand for Transport. Infrastructure and Urban Development Department, World Bank, 1990.

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