APA (7th ed.) Citation

Unesco & Cavendish, R. (2008). 1001 historic sites you must see before you die. Barron's.

Chicago Style (17th ed.) Citation

Unesco and Richard Cavendish. 1001 Historic Sites You Must See Before You Die. Hauppauge, NY: Barron's, 2008.

MLA (9th ed.) Citation

Unesco and Richard Cavendish. 1001 Historic Sites You Must See Before You Die. Barron's, 2008.

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