All Creative Commons (CC) licences require that users of the work attribute the creator. This is also a requirement under Australian copyright law. This means you always have to acknowledge the creator of the CC work you are using, as well as provide any relevant copyright information.
For many users of CC material, attribution is one of the hardest parts of the process. This guide is designed to help you ensure you are attributing the creator of a CC licensed work in the best possible way.
This is an excellent PDF guide to attribution.