Konovalov, P. N. (1893). Prodazhnye pepsiny v sravnenīi s normalʹnym zheludochnym sokom. Tip. ︠I︡A. Treĭ.
Lua i Stíl Chicago (17ú heag.)Konovalov, Petr Nikolaevich. Prodazhnye Pepsiny V Sravnenīi S Normalʹnym Zheludochnym Sokom. S.-Peterburg: Tip. ︠I︡A. Treĭ, 1893.
Lua MLA (8ú heag.)Konovalov, Petr Nikolaevich. Prodazhnye Pepsiny V Sravnenīi S Normalʹnym Zheludochnym Sokom. Tip. ︠I︡A. Treĭ, 1893.
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