Cita APA
World Book, Inc. (1992). The World Book Encyclopedia: W-X-Y-Z - Volume -21. World Book, Inc.
Citación estilo Chicago
World Book, Inc. The World Book Encyclopedia: W-X-Y-Z - Volume -21. Chicago: World Book, Inc, 1992.
Cita MLA
World Book, Inc. The World Book Encyclopedia: W-X-Y-Z - Volume -21. World Book, Inc, 1992.
Warning: These citations may not always be 100% accurate.