Cita APA

(1977). The New Encyclopaedia Britannica (15th ed.). Encyclopaedia Britannica.

Citación estilo Chicago

The New Encyclopaedia Britannica. 15th ed. Chicago: Encyclopaedia Britannica, 1977.

Cita MLA

The New Encyclopaedia Britannica. 15th ed. Encyclopaedia Britannica, 1977.

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