Pi︠a︡tnadt︠s︡atʹ let Narodnoĭ Bolgarii.
Пятнадцать лет Народной Болгарии
APA Citation
Institut mezhdunarodnykh otnosheniĭ (Moscow, R. (1959). Pi︠a︡tnadt︠s︡atʹ let Narodnoĭ Bolgarii. Moskva: Izd-vo IMO.
MLA Citation
Institut mezhdunarodnykh otnosheniĭ (Moscow, Russia). Pi︠a︡tnadt︠s︡atʹ Let Narodnoĭ Bolgarii. Moskva: Izd-vo IMO, 1959.
Warning: These citations may not always be complete (especially for serials).