<cite> tag represents a citation to a referenced work such as a book, a song, or a painting. It needs to include only the title of the work being referenced.
<cite><!-- Title of work goes here --></cite>
<cite> is a tag that wraps around text. That text may also be wrapped in a link to an external source for the citation, if one is available.
Suppose there is an article on the integral, from calculus, on this page. It features a direct quote from Wikipedia, so it will need to be cited.
<html><head> </head><body><figure><blockquote>The major advance in integration came in the 17th century with theindependent discovery of the fundamental theorem of calculus by Leibnizand Newton.</blockquote><figcaption>From<cite><a href="https://en.wikipedia.org/wiki/Integral#Leibniz_and_Newton">Integral</a></cite>, on Wikipedia.</figcaption></figure></body></html>