It is possible to link your Zotero account, to MyReadings, and add citations from Zotero to your course lists.
The instructions for connecting Zotero and MyReadings can be found here:
Ex Libris / Zotero (MyReadings is Lakehead's name for Leganto from Ex Libris)
You will need to login into the Zotero website to gather the needed information.
Once Zotero and MyReadings are connected, you will be able to click Add from one of your reading lists, and Zotero will appear from Import References.