i have a problem with my literature review.Please some one help. Does the study plan or objective come before or after the literature review? is the citing style very important?

After, and citing style depends on your supervisor's preference or school rule.

I completed my MA thesis some time ago, but my objectives came before the literature review as was part of an introduction chapter e.g. I wrote a bit of background, then outlined the aims of the study before branching into the literature review. After the literature review, that is where the 'plan' is detailed if by this you mean your methods and approach etc?