Putzi-Ortiz, S. (2008). A to Z world points of interest: 175 countries - cultural sites, historic sites, museums, architectural landmarks, religious sites, theme parks, parks, gardens, zoos, national parks, natural sites. World Trade Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Putzi-Ortiz, Sibylla. A to Z World Points of Interest: 175 Countries - Cultural Sites, Historic Sites, Museums, Architectural Landmarks, Religious Sites, Theme Parks, Parks, Gardens, Zoos, National Parks, Natural Sites. Petaluma: World Trade Press, 2008.
Παραπομπή σε μορφή MLA (9th εκδ.)Putzi-Ortiz, Sibylla. A to Z World Points of Interest: 175 Countries - Cultural Sites, Historic Sites, Museums, Architectural Landmarks, Religious Sites, Theme Parks, Parks, Gardens, Zoos, National Parks, Natural Sites. World Trade Press, 2008.