Queen City Philatelic Society & Eastern Stamp Exchange. The Rocky Mountain stamp. Rocky Mountain Stamp Pub. Co.
Cita Chicago Style (17a ed.)Queen City Philatelic Society y Eastern Stamp Exchange. The Rocky Mountain Stamp. Denver, Colo.: Rocky Mountain Stamp Pub. Co.
Cita MLA (8a ed.)Queen City Philatelic Society y Eastern Stamp Exchange. The Rocky Mountain Stamp. Rocky Mountain Stamp Pub. Co.
Precaución: Estas citas no son 100% exactas.