APA Edition Citation

(1976). World book encyclopedia, Vol.21: W, X Y Z. Field Enterprises Educational Co.

Chicago Edition Citation

World Book Encyclopedia, Vol.21: W, X Y Z. Chicago: Field Enterprises Educational Co, 1976.

MLA Edition Citation

World Book Encyclopedia, Vol.21: W, X Y Z. Field Enterprises Educational Co, 1976.

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