APA Citation

(1999). Guiness book of the 20th century: Milennium edition. London: Guiness World Record.

Chicago Style Citation

Guiness Book of the 20th Century: Milennium Edition. London: Guiness World Record, 1999.

MLA Citation

Guiness Book of the 20th Century: Milennium Edition. London: Guiness World Record, 1999.

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