These are web pages so should be referenced as such.
AUTHOR(S) (Year) Title of page. [Title of web site] Day/month of posted message. Available from: web address [Accessed date].
e.g. JONES, S. (2015) Referencing group. [Facebook] 5th May. Available from: www.facebook.com [Accessed 04/07/16].
or DE MONTFORT UNI DMU (2016) DMU Pharmacy student is making a difference as @Diabetes UK Community Champion. [Twitter] 4th July. Available from: https://twitter.com/dmuleicester/status/749928286319439872?lang=en-gb [Accessed 04/07/16].
