APA (7th ed.) Citation

(1998). The New Encyclopaedia Britannica (15a. ed.). Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

The New Encyclopaedia Britannica. 15a. ed. Chicago: Encyclopaedia Britannica, 1998.

MLA (9th ed.) Citation

The New Encyclopaedia Britannica. 15a. ed. Encyclopaedia Britannica, 1998.

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