Although every database is a little different in appearence, they all have a permalink/persistent link function. Below you will find screenshots from the more popular databases and where to locate the permalink/persistent links.
Don't forget that a DOI is a permalink/persistent link.
Purple is the proxy code, the blue is the database code, the red is the article ID.
Linking to articles with DOI (digital object identifier)
Taylor and Francis Journal static URL's
Project Muse (URL)