UM OAYK NOUMBA. (2004). MODEL FOR CALCULATING INTERCONNECTION COSTS IN TELECOMMUNICATIONS - CD. WORLD BANK.
Cita Chicago (17th ed.)UM OAYK NOUMBA. MODEL FOR CALCULATING INTERCONNECTION COSTS IN TELECOMMUNICATIONS - CD. WASHINGTON: WORLD BANK, 2004.
Cita MLA (9th ed.)UM OAYK NOUMBA. MODEL FOR CALCULATING INTERCONNECTION COSTS IN TELECOMMUNICATIONS - CD. WORLD BANK, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.