Sari , Bushra Hussein Ali, and Yahya Mohammed Ali Al-Marrani. “Use of English Gratitude Expressions by Yemeni EFL Female Undergraduates- Female-Female and Female-Male Interactions”. Sana’a University Journal of Human Sciences, vol. 3, no. 5, Sept. 2024, pp. 358-83, doi:10.59628/jhs.v3i5.1056.