@article{
  author = {, , , , , Mohammad, , },
  title = { A Study of Humanities Textbooks   within the Framework of Halliday's Systemic Functional Grammar from the Viewpoint of Interpersonal Metafunction },
  journal = {Pazhūhish-i Źabān  va Adabiyyāt-i Farsī},
  year = {2010},
  volume = {8},
  number = {17},
  pages = {1-10},
  doi = {}
}