APA (7th ed.) Citation

(1978). The new encyclopedia Britannica (15th ed.). Encyclopedia Britannica.

Chicago Style (17th ed.) Citation

The New Encyclopedia Britannica. 15th ed. Chicago: Encyclopedia Britannica, 1978.

MLA (9th ed.) Citation

The New Encyclopedia Britannica. 15th ed. Encyclopedia Britannica, 1978.

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