Plan your summary before you write it out. Here is an example outline you might follow.
Introduction paragraph - short paragraph outlining what is being covered in this paper. No citations, no level 1 header, and I would suggest 3-4 sentences maximum.
Article Summary - use a level 1 header here that is easily associated with the article. I would aim for about 125-150 words and cite the author at least 3 times.
Compare/contrast - use another level 1 header here that is easily associated with the article. I would again aim for about 125-150 words and again cite the author at least 3 times.
Conclusion - just recap what you’ve covered - no new information should be provided here and no cited source info. I would suggest 3-4 sentences maximum.