book, w. (2007). The World Book Encyclopedia: W-x-Y-Z Volume 21. a scot fetzer company.
Chicago Style (17th ed.) Citationbook, world. The World Book Encyclopedia: W-x-Y-Z Volume 21. a scot fetzer company, 2007.
MLA (8th ed.) Citationbook, world. The World Book Encyclopedia: W-x-Y-Z Volume 21. a scot fetzer company, 2007.
Warning: These citations may not always be 100% accurate.