Hamdan, Jihad, and Hady Hamdan. “Emergence and Development of Wh-Questions in Jordanian Arabic-Speaking Children: A Longitudinal Study”. East European Journal of Psycholinguistics , vol. 7, no. 2, Dec. 2020, pp. 28-55, https://doi.org/10.29038/eejpl.2020.7.2.ham.