See this example properly formatted in the QUT Cite tool.
Standard in-text citation examples are in Getting started - In-text citation.
Author AA. Title [format]. Place of publication: Publisher; Year [cited Year Month Day]. Available from: http://www.xxx.xxx.xxx
Hou J. PUB251 Public Health & epidemiology week 4 lecture notes [lecture notes on internet]. Brisbane (QLD): Queensland University of Technology; 2010 [cited 2010 Mar 22]. Available from: http://blackboard.qut.edu.au
The URL for the Blackboard homepage is provided rather than the URL of the specific page.
For recordings of lectures see Lecture recording.