Overview
You do not need sources other than the article you are critiquing. You should cite the article you choose. If you use a direct quotation, then you will need the author(s), year, and page number, for example (Christie, et al., 2016, p. 242).
Be sure to read through your article multiple times and look up any terms that you do not understand. As you write the critique, use the rubric as a guide. You can have a section header for each section of the rubric. The first three sections are essentially your summary of what is in the article, and the final section is your critique (i.e., critical evaluation of the article- both the research and the writing).