National Flag Foundation. Flag Plaza standard: A triannual publication of the National Flag Foundation. National Flag Foundation.
Chicago-Zitierstil (17. Ausg.)National Flag Foundation. Flag Plaza Standard: A Triannual Publication of the National Flag Foundation. Pittsburgh, Pa.: National Flag Foundation.
MLA-Zitierstil (8. Ausg.)National Flag Foundation. Flag Plaza Standard: A Triannual Publication of the National Flag Foundation. National Flag Foundation.
警告：这些引文格式不一定是100％准确.