Cita APA (7a ed.)

(1990). The new encyclopaedia Britannica (15th ed., reimp.). Encyclopaedia Britannica.

Cita Chicago Style (17a ed.)

The New Encyclopaedia Britannica. 15th ed., reimp. Chicago [etc.]: Encyclopaedia Britannica, 1990.

Cita MLA (9a ed.)

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