The CIPD assignment, as well as academic assignments as a whole, must contain citations and references. Reference lists and in-text citations are required as part of academic writing. The rough notes you make for the assignment can be used for this purpose.
Harvard referencing style is used in the CIPD assignment. When writing your assignment, you will be able to significantly reduce your in-text citations and the creation of reference lists if you familiarize yourself with it early enough.