APA (7th ed.) Citation

Hoffmann & Krings. (2007). 100 great wonders of the world: From manmade masterpieces to breathtaking surprises of nature. Parragon.

Chicago Style (17th ed.) Citation

Hoffmann and Krings. 100 Great Wonders of the World: From Manmade Masterpieces to Breathtaking Surprises of Nature. New York: Parragon, 2007.

MLA (8th ed.) Citation

Hoffmann and Krings. 100 Great Wonders of the World: From Manmade Masterpieces to Breathtaking Surprises of Nature. Parragon, 2007.

Warning: These citations may not always be 100% accurate.