APA Citation

(1991). 1991 Britannica book of the year. Chicago: Encyclopedia Britannica, inc.

Chicago Style Citation

1991 Britannica Book of the Year. Chicago: Encyclopedia Britannica, inc, 1991.

MLA Citation

1991 Britannica Book of the Year. Chicago: Encyclopedia Britannica, inc, 1991.

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