Hussein, Ibtisam, Jihad Al-Oreifi, and Ayman Yasin. 2022. “Acoustic Characteristics of Pronouncing Disordered /r/ According to Duration and Number of Trills: A Comparative Study”. Dirasat: Human and Social Sciences 49 (2):300-319. https://doi.org/10.35516/hum.v49i2.1792.