Hoffman & Krings. (2007). 100 wonders of the world. Parragon.
Chicago Style (17th ed.) CitationHoffman and Krings. 100 Wonders of the World. England: Parragon, 2007.
MLA (8th ed.) CitationHoffman and Krings. 100 Wonders of the World. Parragon, 2007.
Warning: These citations may not always be 100% accurate.