Heggie, I. G. (1998). Commercial management and financing of roads. Washington, DC.: The World Bank.
Παραπομπή Chicago StyleHeggie, Ian G. Commercial Management and Financing of Roads. Washington, DC.: The World Bank, 1998.
Παραπομπή MLAHeggie, Ian G. Commercial Management and Financing of Roads. Washington, DC.: The World Bank, 1998.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.