MLA

Annenkov, P. V. (Pavel Vasilʹevich), 1813-1887. A.S. Pushkin materīaly dli︠a︡ ego bīografīi i ot︠s︡i︠e︡nki proizvedenīĭ. 1873.. https://collections.library.yale.edu/catalog/30067334.

APA, 6th edition

Annenkov, P. V. (Pavel Vasilʹevich), 1813-1887. (1873.)[A.S. Pushkin materīaly dli︠a︡ ego bīografīi i ot︠s︡i︠e︡nki proizvedenīĭ]. https://collections.library.yale.edu/catalog/30067334.