APA (7th ed.) Citation

(1979). The new encyclopaedia Britannica in 30 volumes. Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

The New Encyclopaedia Britannica in 30 Volumes. Chicago: Encyclopaedia Britannica, 1979.

MLA (9th ed.) Citation

The New Encyclopaedia Britannica in 30 Volumes. Encyclopaedia Britannica, 1979.

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