Consulting your professor about the issue is also a nice idea - after all, you could find a lot of research abstract examples online, but not every research paper necessarily presupposes this section.
If you have already decided that the paper you are working on definitely needs an abstract, still - don't rush to download just any example of abstract you can find online. Looking at a sample abstract, students often think that this part is some kind of extension to their introduction.
So, let's try to look at how to write abstract before we move to actual abstract examples.
An abstract is a brief, strong and always self-contained paper that describes a great work. A summary of a social science or other scientific work could incorporate the scope, reason, results, and contents of the work.
You should draw the reader in and make them want to read the rest of the paper.
The next paragraphs in the introduction should cite previous research in this area.
Anytime students are required to write an APA style paper, they start googling for examples of abstract online.
While some practical, real-life samples can prove pretty useful in your research, you still have to understand that even an amazing example abstract will be of no use if you do not understand why you need this section in your paper, or what purpose it serves.
You can't write a good introduction until you know what the body of the paper says.
Consider writing the introductory section(s) after you have completed the rest of the paper, rather than before.