https://www.unodc.org/

https://www.unodc.org/LSS/Page/NPS

https://www.emcdda.europa.eu/

https://www.emcdda.europa.eu/topics/nps_en

https://nps-info.org/en/

UNODC Annual Report (2018), https://drive.google.com/file/d/1u8XpCl4NLUzeOJut7YxVQdKJ1IqdnFX_/view?usp=sharing 



ແກ້ໄຂເທື່ອສຸດທ້າຍເມື່ອ: ວັນອັງຄານ, 27 ກັນຍາ 2022, 4:43 PM