You should start by identifying the type of resource from the reference list. If you have familiarised yourself with your referencing style, it should be clear what type of resource this is. 

If the resource is an e-resource, it should include a DOI link or an URL which should take you directly to the source. 

You can also try searching for the name of the source within Library Search to see if it can be located through the collections already available. 

You may find the Library Skills Guides page helpful.