APA (7th ed.) Citation

(1990). The New Encyclopaedia Britanica (15.). Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

The New Encyclopaedia Britanica. 15. Chicago: Encyclopaedia Britannica, 1990.

MLA (9th ed.) Citation

The New Encyclopaedia Britanica. 15. Encyclopaedia Britannica, 1990.

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