APA (7th ed.) Citation

(1989). Britannica atlas ([Ed. 1989].). Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

Britannica Atlas. [Ed. 1989]. Chicago [etc.]: Encyclopaedia Britannica, 1989.

MLA (9th ed.) Citation

Britannica Atlas. [Ed. 1989]. Encyclopaedia Britannica, 1989.

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