How should a high quality literature review actually be written?

The grade of a dissertation depends significantly on the quality of the overall report along with the structure and quality of the individual chapters contained within the document. The longest and most important chapter in a thesis is the literature review which combines your study with previously conducted researches in a way that you first attempt to identify and point out the gaps found in previous researches and then present how these gaps will be filled in other chapters. Therefore a high quality literature review should actually criticize previously conducted researches and portray the gaps or limitations present in the theories or concepts put forward by researchers in the past. Secondly, your review needs to be explicable and excellent in terms of writing which means that the appropriate level of writing should be used and there should be no mistakes whatsoever with respect to grammar, spelling or sentence use. You should also ensure that you have cited all sources correctly and appropriately in the required citation style.