Using Interlibrary Loan, you can gain access to almost anything. It takes a few more steps than buying a book or article, but ILL is a free service.
Here is an example from Business Source Premier:

Clicking on highlighted link takes you to OneSearch:

Once you sign in you will see an option to use Interlibrary Loan:

You will log into Interlibrary Loan and the request form will be pre-populated:

For an article, you will receive a message from Interlibrary Loan in a day or two. You then log back in to ILL and download your article:

If you receive a message stating that the item requested is not available for free, you can elect to use your library subsidy. Log into ILL, choose 'Canceled requests' and click on 'Resubmit request.' You will not personally pay for the resource, as you have a graduate student subsidy.