(In respect of your comment, it's posted!)

Hi Asal

I wanna prepare myself to MA exam next year too; my professors have suggested these books for me to MA exam, of course for the MA Examination of TEFL.

Teaching methodology:

1-       Techniques and Principles in Language Teaching. D. Larsen Freeman  

2-       Developing Second Language Skills. Kenneth Chastain  

3-       Principles of Language Teaching and Learning. Douglas H. Brown  

4-       Approaches and Methods in Language Teaching. Richards & Rodgers  

Linguistics:

1-       The Study of Language. G. Yule  

2-       Linguistics and Languages. Julia S. Falk

3-       An Introduction to Language. Fromkin and Rodman

4-       Phonetics and phonology (Peter Roach(     

Testing:

1-       Testing Language Skills, From Theory to Practice. Farhadi, Jafarpour and Birjandi  

2-       Language Testing. Jafarpour (Payame Noor)  

3-       Testing English as a Second Language. D. Harris  

4-       Writing English Language Tests. J.B. Heaton

General English (my suggestion):

1-       Practical English Usage. Michael Swan (Grammar)

2-       تافل راهنما-ابراهیم نظری تیموری  (Grammar, Idiom, Vocabulary)

3-       1100 Words (Vocabulary)

4-       Essential words for TOEFL (Vocabulary)

5-       504 words (Vocabulary)

6-       Vocabulary for the high school student (Vocabulary)