Britannica book of the year. Encyclopaedia Britannica, Inc.
Cita Chicago (17th ed.)Britannica Book of the Year. Chicago, Ill.: Encyclopaedia Britannica, Inc.
Cita MLA (8th ed.)Britannica Book of the Year. Encyclopaedia Britannica, Inc.
Atenció: Aquestes cites poden no estar 100% correctes.