National Geographic Society (United States). Cartographic Division, Grosvenor, G. M., Garrett, W. E., Garver, J. B., Jr, & Shupe, J. F. (1984). A traveler's map of Spain and Portugal [cartographic material]. The Society.
Lua i Stíl Chicago (17ú heag.)National Geographic Society (United States). Cartographic Division, Gilbert M. Grosvenor, Wilbur E. Garrett, John B. Garver, Jr, agus John F. Shupe. A Traveler's Map of Spain and Portugal [cartographic Material]. Washington, D.C: The Society, 1984.
Lua MLA (9ú heag.)National Geographic Society (United States). Cartographic Division, et al. A Traveler's Map of Spain and Portugal [cartographic Material]. The Society, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.