No, you do not need to purchase it. While our database subscriptions don't provide full text to all journals and articles, we are able to get copies for current students, faculty, staff, and alumni through interlibrary loan. Click here to submit your request, and the library staff will request a copy of the article from a library that does have access. It will be emailed to you as a PDF.
Read RSU Libraries' Interlibrary Loan policy here.