al-Shammari, Dr. Mowaffaq H. Mansi. “The Need for the Presence, Absence or Alternation of the Null Subject in the Spanish Language”.
Al-Adab Journal
, vol. 1, no. 136, Mar. 2021, pp. 1-12,
https://doi.org/10.31973/aj.v1i136.1182
.