^Loguidice, Bill; Barton, Matt. Vintage Games: An Insider Look at the History of Grand Theft Auto, Super Mario, and the Most Influential Games of All Time. CRC Press. 2012-08-21: 182. ISBN 978-1-136-13758-7.
^Gotcha. International Arcade Museum. [2016-10-11].
^Loguidice, Bill; Barton, Matt. 5. Vintage Games: An Insider Look at the History of Grand Theft Auto, Super Mario, and the Most Influential Games of All Time. CRC Press. 2012-08-21. ISBN 978-1-136-13758-7.