For courses that are licensed under the CC-BY-NC Non commercial licence (including ABC Learning Design) you must first seek permission from the licence holders before you use the course for any commercial purposes. “NonCommercial means not primarily intended for or directed towards commercial advantage or monetary compensation.” (wiki.creativecommons.org)
Once permissions has been granted, or if you are only using the work for non-commercial purposes, you must always note the author, licence (CC BY-NC) and source (URL).
You can use this template for attribution:
This work by <your name> (<your institution>), is a derivative of work by <authors (and institutions) and> Moodle Academy (Moodle Pty Ltd). Licensed under CC BY-NC 4.0. Original resources available at https://moodle.academy.
Example:
This work by Joe Bloggs (Mount Orange) is a derivative of work by Clive Young (UCL), Nataša Perović (UCL), Clare Gormley (DCU) and Moodle Academy (Moodle Pty Ltd). Licensed under CC BY-NC 4.0. Original resources available at https://moodle.academy.