︠T︡Syganko, V. S. (2007). Ėtapnostʹ razviti︠i︡a paleozoĭskoĭ bioty i ee korrel︠i︡a︠t︡sionnyĭ poten︠t︡sial. Geoprint.
Chicago Style (17th ed.) Citation︠T︡Syganko, V. S. Ėtapnostʹ Razviti︠i︡a Paleozoĭskoĭ Bioty I Ee Korrel︠i︡a︠t︡sionnyĭ Poten︠t︡sial. Syktyvkar: Geoprint, 2007.
MLA (8th ed.) Citation︠T︡Syganko, V. S. Ėtapnostʹ Razviti︠i︡a Paleozoĭskoĭ Bioty I Ee Korrel︠i︡a︠t︡sionnyĭ Poten︠t︡sial. Geoprint, 2007.
Warning: These citations may not always be 100% accurate.