National Flag Foundation. The standard bearer: A National Flag Foundation publication. National Flag Foundation.
Citazione stile Chigago Style (17a edizione)National Flag Foundation. The Standard Bearer: A National Flag Foundation Publication. Pittsburgh, PA: National Flag Foundation.
Citatione MLA (8a ed.)National Flag Foundation. The Standard Bearer: A National Flag Foundation Publication. National Flag Foundation.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.