Atlasgeo: Australia: Animated GIF image of the national flag.
Ausflag: Australian Flags Since 1788: National, state, territory, and other flags of the past and present.
Australian National Flag Association: Includes images, description, and instructions for making a flag of Australia.
Flags of the World: Australia: Design and history of national, state, territorial, military, historical, and native peoples' flags.
It's an Honour: Flying the Flag: Guidelines on flying the flag and using it commercially, with images and template.
National Archives of Australia: Fact Sheet 102: Selected records relating to the flag and history of its design.
The Australian Flag: Information on the national, state, territorial, and other flags.
Theodora.com - Flags of Australia: Offers national and aboriginal flags of Australia.
World Flag Database: Australia: National, state, territorial, and royal family flags.