The em tag can be used to emphasize (italicize) text.
Final Code
<style>h4{text-align:center;height:25px;}p{text-align:justify;}.links{text-align:left;color:black;}.fullCard{width:245px;border:1pxsolid#ccc;border-radius:5px;margin:10px5px;padding:4px;}.cardContent{padding:10px;}.cardText{margin-bottom:30px;}</style><divclass="fullCard"><divclass="cardContent"><divclass="cardText"><h4>Google</h4><p><em>...they were <u>Ph.D. students</u> at <strong>Stanford University</strong>.</em></p></div><divclass="cardLinks"><ahref="https://en.wikipedia.org/..."target="_blank"class="links">Larry Page</a><br><br><ahref="https://en.wikipedia.org/..."target="_blank"class="links">Sergey Brin</a></div></div></div>