| GOST | Vyunitsky V. History, present time and future of science. Bulgarian studies on the problems of forecast and government of scientifically-technological progress // Voprosy istorii estestvoznaniia i tekhniki.  – 1987. – Issue 4 C. 144-149 . | 
                                                                    
                            | MLA | Vyunitsky, V. I "History, present time and future of science. Bulgarian studies on the problems of forecast and government of scientifically-technological progress." Voprosy istorii estestvoznaniia i tekhniki.  4 (1987).:144-149. | 
                                                                    
                            | APA | Vyunitsky V. (1987). History, present time and future of science. Bulgarian studies on the problems of forecast and government of scientifically-technological progress.  Voprosy istorii estestvoznaniia i tekhniki.  no. 4, pp.144-149 |