Tye state forest committee of tye USSR & International union of forestry researcy organitations. (1990). Forest,Genetics,Breeding and Physiology of Woody Plants (September 24 - 30,1989,Voronezy) Procedings of tye international Simposium (Additional Issue): сборник.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Tye state forest committee of tye USSR و International union of forestry researcy organitations. Forest,Genetics,Breeding and Physiology of Woody Plants (September 24 - 30,1989,Voronezy) Procedings of Tye International Simposium (Additional Issue): сборник. 1990.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Tye state forest committee of tye USSR و International union of forestry researcy organitations. Forest,Genetics,Breeding and Physiology of Woody Plants (September 24 - 30,1989,Voronezy) Procedings of Tye International Simposium (Additional Issue): сборник. 1990.