1. Legislative Decree 9 April 2008, No. 81 Official Journal of the Italian Republic 2008 101(108/L)
2. EWDTS European Laboratory Guidelines for Legally Defensible Workplace Drug Testing - 1. Urine Drug Testing http://www.ewdts.org/guidelines.html
3. As/Nzs 4308:2008 - Procedures for Specimen Collection and the Detection and Quantitation of Drugs of Abuse in Urine 2008
4. SAMSHA Mandatory Guidelines for Federal Workplace Drug Testing Programs http://workplace.samhsa.gov/drugtesting/level_1_pages/mandatory_guidelines5_1_10.html
5. Guidelines for Oral Flui;Cooper;Drug Test. Anal.,2011