Try looking in LibrarySearch (the large search box on the MRU Library homepage) to see if MRU owns it as an ebook:
Search for the book title from which your primary source was excerpted; if we own many versions of a text, sometimes it helps to add the publisher or translator's name to your search.
If you can't find a version of your primary source in the form of a book, try looking in these reputable online collections:
Assess carefully the sources you find. You should be able to easily determine who made the source available, and when and where the source was originally published or created. Look for sources being offered by credible organizations like libraries, universities, museums and scholarly societies.
START YOUR SOURCE ANALYSIS HERE, with background information. For basic biographical details and information about the historical context of an author or an event, the best place to look is in a scholarly encyclopedia. Most primary source analyses should start with encyclopedia research.
After encyclopedias/background sources, your next move to should be to look at books about your author, text and historical time period. Books are a good next step because they are likely to offer broad context on a topic.
Note that journal articles tend to be more focused on very specific details of a topic, so it helps to have a general understanding of the topic before you look for journal articles.