MLA

Istomin, F. M. (Fedor Mikhaĭlovich), 1856-1920. Ukazatelʹ k izdanīi︠a︡m Imperatorskago russkago geograficheskago obshchestva i ego otdi︠e︡lov : s 1886 po 1895 god. 1896.. https://collections.library.yale.edu/catalog/30062328.

APA, 6th edition

Istomin, F. M. (Fedor Mikhaĭlovich), 1856-1920. (1896.)[Ukazatelʹ k izdanīi︠a︡m Imperatorskago russkago geograficheskago obshchestva i ego otdi︠e︡lov : s 1886 po 1895 god]. https://collections.library.yale.edu/catalog/30062328.