︠I︡Ugaĭ, T. A., & Khlopov, V. D. (1989). Sovokupnyĭ trud APK: Sistemno-strukturnyĭ aspekt (Nauch. izd.). "Nauka".
Chicago Style (17th ed.) Citation︠I︡Ugaĭ, T. A., and V. D. Khlopov. Sovokupnyĭ Trud APK: Sistemno-strukturnyĭ Aspekt. Nauch. izd. Moskva: "Nauka", 1989.
MLA (8th ed.) Citation︠I︡Ugaĭ, T. A., and V. D. Khlopov. Sovokupnyĭ Trud APK: Sistemno-strukturnyĭ Aspekt. Nauch. izd. "Nauka", 1989.
Warning: These citations may not always be 100% accurate.