Cita APA

(1990). The New Encyclopedia Britannica (15th ed.). Encyclopaedia Britannica.

Citación estilo Chicago

The New Encyclopedia Britannica. 15th ed. Chicago: Encyclopaedia Britannica, 1990.

Cita MLA

The New Encyclopedia Britannica. 15th ed. Encyclopaedia Britannica, 1990.

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