APA (7e ed.) Bronvermelding

National Geographic Society (U.S.). Book Division & Maxa, R. 100 countries, 5000 ideas: Where to go, when to go, what to see, what to do.

Chicago (17e ed.) Bronvermelding

National Geographic Society (U.S.). Book Division en Rudy Maxa. 100 Countries, 5000 Ideas: Where to Go, When to Go, What to See, What to Do.

MLA (9e ed.) Bronvermelding

National Geographic Society (U.S.). Book Division en Rudy Maxa. 100 Countries, 5000 Ideas: Where to Go, When to Go, What to See, What to Do.