MLA

Umozritelʹnyi︠a︡ izsli︠e︡dovanīi︠a︡ Imperatorskoĭ Sanktpeterburgskoĭ akademīi Nauk 1808 / T.1. Pri Imperatorskoĭ akademīi nauk, 1808. https://collections.library.yale.edu/catalog/30665858.

APA, 6th edition

Umozritelʹnyi︠a︡ izsli︠e︡dovanīi︠a︡ Imperatorskoĭ Sanktpeterburgskoĭ akademīi nauk 1808 / t.1. (1808). [Periodicals]. Pri Imperatorskoĭ akademīi nauk. https://collections.library.yale.edu/catalog/30665858.