Links
http://www.usability.gov/pdfs/chapter10.pdf

Usability.gov
2006

Abstract:

Linking means that users will select and click on a hypertext link on a starting page (usually the homepage), which then causes a new page to load. Users continue toward their goal by finding and clicking on subsequent links. To ensure that links are effectively used, designers should use meaningful link labels (making sure that link names are consistent with their targets), provide consistent clickability cues (avoiding misleading cues), and designate when links have been clicked. Whenever possible, designers should use text for links rather than graphics. Text links usually provide much better information about the target than do graphics.