Shenina, K. M., و H. M. Saleh Es-skare. "Gender Variation in Voice Quality in Learning English As A Foreign Language: An Investigation into Libyan Learners’ Perceptions". مجلة البحوث الأكاديمية, م 13, يناير، 2019, ص 108-17, doi:10.65540/jar.v13i.942.