Before one chooses a good abstract, one should remember the purpose of the abstract to begin with. It is a dominant statement describing the larger work. It usually has a few keywords that will help the reader understand the main points that are coming. The overall purpose is to quickly inform the reader of what this about and why it is important so that they can decide if they want to keep reading or not.
When looking for a dissertation abstract you should look for the following factors to make sure you are getting a proper one.
All abstracts that you may be considering should have the following also: a full report of the source used, the same type of words used as in the larger work; and the key words that will quickly show the larger type of the work to be read.
Wisdom comes in two parts, one is to know what to look for, the other is to know what to avoid. Here are a few things that abstracts should not have: it should not have to refer too much to other works, it should not be putting in additional information that is not talked about in the larger work, and it should not define the terms. If you want to spend less time working through all these options and choices, then get professional help from this website, which has done the work for you.