Shperk, G., & Шперк, Г. (2014). Uchenīe o gimnospermīi vʺ rastitelʹnomʺ t︠s︡arstvi︠e︡, s 200 figurami. [Imperatorskai︠a︡ Akademīi︠a︡ nauk].
Chicago Style (17th ed.) CitationShperk, Gustav, and Густав Шперк. Uchenīe O Gimnospermīi Vʺ Rastitelʹnomʺ T︠s︡arstvi︠e︡, S 200 Figurami. Sanktpeterburgʺ: [Imperatorskai︠a︡ Akademīi︠a︡ nauk], 2014.
MLA (8th ed.) CitationShperk, Gustav, and Густав Шперк. Uchenīe O Gimnospermīi Vʺ Rastitelʹnomʺ T︠s︡arstvi︠e︡, S 200 Figurami. [Imperatorskai︠a︡ Akademīi︠a︡ nauk], 2014.
Warning: These citations may not always be 100% accurate.