http://www.efcats.org/Give+Successful+Presentations.html?highlight=oral+presentations
http://www.youtube.com/watch?v=gOwQUd8qkMM
http://www.lc.unsw.edu.au/onlib/tutsem.html
https://www.llas.ac.uk/resources/mb/2722
http://www.ted.com/
http://www.youtube.com/watch?v=MjcO2ExtHso