APA (7th ed.) Citation

World Book, Inc. (1986). Science year 1987. World Book.

Chicago Style (17th ed.) Citation

World Book, Inc. Science Year 1987. Chicago: World Book, 1986.

MLA (9th ed.) Citation

World Book, Inc. Science Year 1987. World Book, 1986.

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