HathiTrust provides options for permanent linking to a page in a volume, the whole volume or a public collection. The links are in lower left hand corner of the Full View of a volume or a Collection. Collections need to be public for accurate linking. Collections and resources may also be shared via various social media sites such as Facebook, reddit, Twitter, and others.
It is also possible to embed HathiTrust content into another web page. In Full View, in the left column at the very bottom is the "Embed" link. That provides code to paste into the HTML of a website or blog. Below is an example of an embedded resource.