We were told to use this website for the basic ideas; [http://www.businessballs.com/maslow.htm Business Balls]
What course are you doing? I have an old textbook that has been discontinued that is also very easy to understand. [http://www.amazon.co.uk/Business-Higher-Awards-second-Marketing/dp/0435453149 Business for Higher Awards]
We use BPP Learning Media textbooks which are made for each module of our HND, they explain well, but maybe not for dummies. Not sure of anywhere simpler though!