From off-campus...
To search any of the EVC Library databases from a computer off-campus, you will need to login through Single Sign-On which requires your EVC issued Student Email and Password. See sign-on instructions for details or view video (click on image).
For a brief overview of the major characteristics that are used to distinguish these two types of publications, see this online guide Skyline College.
For more on the peer-review process, see this page from the Lloyd Sealy Library.
You can also refer to the EVC Library handout available at the library reference desk. (Also available as a downloadable PDF.)