The Henley and Grange Swimming Club teaches and competes in all the competition strokes. Here are some links from Phillip Toriello at Livestrong and Expert Village to demonstrate those strokes and the correct and legal turns in competition.
The Freestyle Stroke
The Breastroke Stroke
The Backstroke Stroke and Turns
The Butterfly Stroke and Turns
Australian Coaches & Teachers Association
Swimming and Recreational Centres around Australia
Guide to Swim Safety