I referenced a book sevral times in my proposal.should I write page numbers in references?:dizzy_face:

please help me

It all depends on who you are writing the document for?  Is it a footnote, or is it a listing in the bibliography.  What are the rules of place your are submitting this work?  

If you are citing a specific quote - then you do usually give a page number, but if it is a  paraphrased idea or conclusion, that it is often not required.  Depends on the discipline, and publication’s guidelines.