John Grochowski. «How to Play Keno». entertainment.howstuffworks.com (em inglês). Publications International, Ltd. Consultado em 9 de junho de 2015. It was originally played with 80 Chinese characters, which in the United States were replaced by 80 Arabic numerals.
kenoonline.org
«Keno History». kenoonline.org. Consultado em 9 de junho de 2015