These terms can be considered synonymous and indicate that your sources of information - article, book - are reliable.
Use the link below and follow the instructions: have a look at the title, authors, abstract and references.
Open/download the article.
Use the article you opened/downloaded AND the information from the "Anatomy of a scholarly article".
Before you start - see the Google Scholar menu (tree horizontal lines). That's where you can access the settings and advanced search interface.
Note: Google will be able to access only small portion of our databases' content.