APA (7th ed.) Citation

World Book, Inc, & IBM Corp. (1998). 1999 World Book international deluxe English edition. IBM.

Chicago Style (17th ed.) Citation

World Book, Inc, and IBM Corp. 1999 World Book International Deluxe English Edition. Ireland: IBM, 1998.

MLA (9th ed.) Citation

World Book, Inc, and IBM Corp. 1999 World Book International Deluxe English Edition. IBM, 1998.

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