Shwaysh Ahmed, M., Hayif Sameer, I. y Yassein Al-Heeti, M. T. (2019) «The Semantic Roles Which Cause Difficulty To The Fourth Year Students Of English At The University Of Anbar», Opción, 35(89), pp. 343-368. Disponible en: https://www.produccioncientificaluz.org/index.php/opcion/article/view/31099 (Accedido: 8mayo2024).