Ružencev, V. E. (1950). Verchnekamennougol'nye ammonity Urala. Izd. Akad. Nauk SSSR.
Chicago Style (17th ed.) CitationRužencev, Vasilij E. Verchnekamennougol'nye Ammonity Urala. Moskva: Izd. Akad. Nauk SSSR, 1950.
MLA (9th ed.) CitationRužencev, Vasilij E. Verchnekamennougol'nye Ammonity Urala. Izd. Akad. Nauk SSSR, 1950.
Warning: These citations may not always be 100% accurate.