APA
Valletti T. M., The World Bank, . (1999). The practice of access pricing: telecommunications in the United Kingdom. Washigton: World Bank.
Chicago
Valletti Tommasso M, The World Bank, . 1999. The practice of access pricing: telecommunications in the United Kingdom. Washigton: World Bank.
Harvard
Valletti T. M., The World Bank, . (1999). The practice of access pricing: telecommunications in the United Kingdom. Washigton: World Bank.
MLA
Valletti Tommasso M, The World Bank, . The practice of access pricing: telecommunications in the United Kingdom. Washigton: World Bank. 1999.