National Geographic Society (U.S.). Special Publications Division. (1988). Excursion to enchantment: A journey to the world's most beautiful places. The Society.
Citazione stile Chigago Style (17a edizione)National Geographic Society (U.S.). Special Publications Division. Excursion to Enchantment: A Journey to the World's Most Beautiful Places. Washington, D.C: The Society, 1988.
Citatione MLA (9a ed.)National Geographic Society (U.S.). Special Publications Division. Excursion to Enchantment: A Journey to the World's Most Beautiful Places. The Society, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.