Youngson, D. R. M. (1994). The guiness encyclopedia of the human being. Guiness Publishing.
Chicago Style (17. basım) AtıfYoungson, Dr Robert M. The Guiness Encyclopedia of the Human Being. Middlesex, EN: Guiness Publishing, 1994.
MLA (9th ed.) AtıfYoungson, Dr Robert M. The Guiness Encyclopedia of the Human Being. Guiness Publishing, 1994.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..