Audio Material

Audio-materials are Non-paper educational or promotional such as cassettes, CDs, DVDs, videotape, etc.

This applies to my situation because they are really easy to access and they contain lots of valuable information. This also means I don't have to waste time or money creating my own research.

Bibliography:
WebFinance (2016) ‘What is audiovisual material? Definition and meaning’, in Available at: http://www.businessdictionary.com/definition/audiovisual-material.html (Accessed: 24 May 2016).
In-line Citation:
(WebFinance, 2016)