APA (7th ed.) Citation

(1980). The New Encyclopaedia Britannica: Propaedia : outline of knowledge : guide to the Britannica (Fifteenth edition.). Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

The New Encyclopaedia Britannica: Propaedia : Outline of Knowledge : Guide to the Britannica. Fifteenth edition. Chicago: Encyclopaedia Britannica, 1980.

MLA (8th ed.) Citation

The New Encyclopaedia Britannica: Propaedia : Outline of Knowledge : Guide to the Britannica. Fifteenth edition. Encyclopaedia Britannica, 1980.