MLA

De-Vollan, Grigorīĭ, b. 1847. Ugro-russkīi︠a︡ narodnyi︠a︡ pi︠e︡sni; s prilozhenīem ocherka byta ugorskikh russkikh i ėtnograficheskoĭ karty Vengrīi. 1885.. https://collections.library.yale.edu/catalog/31655861.

APA, 6th edition

De-Vollan, Grigorīĭ, b. 1847. (1885.)[Ugro-russkīi︠a︡ narodnyi︠a︡ pi︠e︡sni; s prilozhenīem ocherka byta ugorskikh russkikh i ėtnograficheskoĭ karty Vengrīi]. https://collections.library.yale.edu/catalog/31655861.