National Flag Foundation. Flag Plaza standard: A triannual publication of the National Flag Foundation. National Flag Foundation.
Style de citation Chicago (17e éd.)National Flag Foundation. Flag Plaza Standard: A Triannual Publication of the National Flag Foundation. Pittsburgh, Pa.: National Flag Foundation.
Style de citation MLA (8e éd.)National Flag Foundation. Flag Plaza Standard: A Triannual Publication of the National Flag Foundation. National Flag Foundation.
Attention : ces citations peuvent ne pas être correctes à 100%.