MLA

Umozritelʹnyi︠a︡ izsli︠e︡dovanīi︠a︡ Imperatorskoĭ Sanktpeterburgskoĭ akademīi Nauk. Pri Imperatorskoĭ akademīi nauk, 1808. https://collections.library.yale.edu/catalog/30665012.

APA, 6th edition

Umozritelʹnyi︠a︡ izsli︠e︡dovanīi︠a︡ Imperatorskoĭ Sanktpeterburgskoĭ akademīi nauk. (1808). [Periodicals]. Pri Imperatorskoĭ akademīi nauk. https://collections.library.yale.edu/catalog/30665012.