Shcherba, L. V., & Zinder, L. R. (1983). Teori︠i︡a russkogo pisʹma. "Nauka," Leningradskoe otd-nie.
Dyfyniad Arddull ChicagoShcherba, Lev Vladimirovich, and Lev Rafailovich Zinder. Teori︠i︡a Russkogo Pisʹma. Leningrad: "Nauka," Leningradskoe otd-nie, 1983.
Dyfyniad MLAShcherba, Lev Vladimirovich, and Lev Rafailovich Zinder. Teori︠i︡a Russkogo Pisʹma. "Nauka," Leningradskoe otd-nie, 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.