APA (7th ed.) Citation

Aun, K. (2010). The Estonian flag: A hundred years of the blue-black-white. Flag Heritage Foundation.

Chicago Style (17th ed.) Citation

Aun, Karl. The Estonian Flag: A Hundred Years of the Blue-black-white. Winchester, Mass: Flag Heritage Foundation, 2010.

MLA (9th ed.) Citation

Aun, Karl. The Estonian Flag: A Hundred Years of the Blue-black-white. Flag Heritage Foundation, 2010.