Gaya APA

Seryodkin, I, V. (2014). Marking activity of the Kamchatka brown bear (Ursus arctos piscator) . : Elsevier.

Gaya MLA

Seryodkin, Ivan, V.. "Marking activity of the Kamchatka brown bear (Ursus arctos piscator)". : Elsevier, 2014. e-journal.