Cita APA (7a ed.)

(1994). The Encyclopaedia Britannica supplement. Encyclopaedia Britannica.

Cita Chicago Style (17a ed.)

The Encyclopaedia Britannica Supplement. Chicago [etc.]: Encyclopaedia Britannica, 1994.

Cita MLA (9a ed.)

The Encyclopaedia Britannica Supplement. Encyclopaedia Britannica, 1994.