hi shan my friend @audio-nrg ,
sorry my notification is not working and I don't know why , I didnt saw your comment. thank you , you are right about mixing and mastering technniques , well I am in iran and it's hard to buy things from the out side , but I find things in Iranian's sites , right now I only have these stuffs :

sorry I know these are not expensive but all I have are these , but I try to buy better stuffs in future , I need to read some books to understand Frequencies better , and to know how to master a song better.