APA (7th ed.) Citation

(1990). The New Encylopaedia Britannica -The Index A-K. The University Of Chicago.

Chicago Style (17th ed.) Citation

The New Encylopaedia Britannica -The Index A-K. America: The University Of Chicago, 1990.

MLA (9th ed.) Citation

The New Encylopaedia Britannica -The Index A-K. The University Of Chicago, 1990.

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