This is the search box for JSTOR. You can search by author or by the work you are researching.
Here is a basic search for criticism about Invisible Man.
Here is a basic search for criticism about Ralph Ellison.
Here is a typical page of results for JSTOR. On the right hand side you will see options to download the PDF to your computer or flash drive, save it (you will need to create a free JSTOR account to do so), or cite (beware of citation generators). There are less limiters in JSTOR than in most other databases - you will probably notice there is no option to filter by peer review. While most of the journals in JSTOR are peer-reviewed, there are older, archival materials that, due to their age, do not adhere to the peer review process. You can be confident though, that all content on JSTOR is scholarly in nature.
Here is an article from JSTOR. To find the permalink, click the "Share" button and choose to email it to yourself. This will email you a permalink that is always accessible - remember to never use the link in your internet browser because it will not work when you go back to access the article. Always use the permalink.