Abdullayev Jo’ra Xudoyorovich, Toshto’xtarov Asadbek Muzaffar o’g’li, Jumanazarova Sitora Shonazar qizi and Temirova Dilnoza Srajiddin qizi 2023. SIFAT MENEJMENTI TIZIMI VA UNI SERTIFIKATLASHTIRISHNI TAKOMILLASHTIRISH . Scientific Impulse. 1, 8 (Apr. 2023), 1010–1013.