Samiha Muqbil Abdullah Alharbi and Yahya Mubark Suleiman Khatatbeh 2023. The Effectiveness of a Counseling program based on Acceptance and Commitment in Reducing the Existential Vacuum among Widows in Riyadh . Migration Letters. 20, S6 (Sep. 2023), 898–908. DOI:https://doi.org/10.59670/ml.v20iS6.4350.