References
^ (2012). Origin and History of Beer and Brewing: From Prehistoric Times to the Beginning of Brewing S... ISBN 9780966208412 (revised Dec 2013)^ John P. Arnold (2012). 9780966208412, Reprint Edition by BeerBooks. Wiki. ISBN 9780966208412 (revised Nov 2012)^ John P. Arnold (2005). Origin and History of Beer and Brewing: From Prehistoric Times to the Beginning of Brewing Science and Technology, BeerBooks.com. Amazon. ISBN 9780966208412 (revised Nov 2014)
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