2 Va. Admin. Code § 5-531-9999
3-A Sanitary Standards and 3-A Accepted Practices, effective as of August 15, 2013, 3-A Sanitary Standards, Incorporated, 6888 Elm Street, Suite 2D, McLean Virginia 22101, www.3-a.org
Official Methods of Analysis of AOAC International, 19th Edition, 2012, AOAC International, 481 North Frederick Avenue, Suite 500, Gaithersburg, Maryland 20877-2417, www.aoac.org
Standard Methods for the Examination of Dairy Products, 17th Edition, 2004, American Public Health Association, 801 I Street NW, Washington, DC 20001, http://www.apha.org