The deadline for the third and final assignment is tomorrow. You are almost done with the assignment, but need to put the finishing touches to the language and references. You are putting quite some effort into this due to the trouble you had on the previous assignments and the warning you got from your teacher.
One of the articles that you have based your background section on is not available on the Internet. You ordered the article from the library, but it hadn’t arrived when you began your work. Fortunately, you found a very good summary and some useful quotations from an article on Wikipedia.
You wrote your background section based on this, and even included one of the quotations, expecting to get the original article before the deadline. Unfortunately, the article still has not arrived and it is too late to rewrite.
You could simply refer to Wikipedia instead of the original article, but you know that your teachers frown on Wikipedia as a source.
How do you proceed?