• AABC Commissioning Group (ACG) http://www.commissioning.org/
  
• American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) http://www.ashrae.org
  
• ASHRAE Hong Kong Chapter http://www.ashrae.org.hk
• ASHRAE Technical Committee 7.9: Building Commissioning http://tc0709.ashraetcs.org/
  
• Association of Energy Engineers (AEE) http://www.aeecenter.org/
  
• Building Commissioning Association (BCA) http://www.bcxa.org/
  
• California Commissioning Collaborative https://www.cacx.org/
• National Environmental Balancing Bureau (NEBB) http://www.nebb.org/
  

• Building commissioning (LBNL) http://cx.lbl.gov/
• Building Commissioning | WBDG Whole Building Design Guide http://www.wbdg.org/building-commissioning
  
• Building Commissioning Process - GSA http://www.gsa.gov/portal/category/21065
• Commissioning and Retrocommissioning (ACEEE) https://aceee.org/topics/commissioning-and-retrocommissioning
• Guide to Building Commissioning - archtoolbox.com http://www.archtoolbox.com/sustainability/guide-to-building-commissioning.html
  
• New-construction building commissioning - Wikipedia http://en.wikipedia.org/wiki/New-construction_building_commissioning
• Retro-Commissioning: Process and Implementation in Healthcare Facilities II (Energy University) https://www.schneideruniversities.com/catalog/view/course/id/621/title/Retro-Commissioning:%20Process%20and%20Implementation%20in%20Healthcare%20Facilities%20II

Hong Kong:

• Architectural Services Department (ArchSD) 建築署 http://www.archsd.gov.hk/
• Testing and Commission Procedure https://www.archsd.gov.hk/en/publications-publicity/testing-commissioning-procedure.html
• Electrical and Mechanical Services Department (EMSD) 機電工程署 http://www.emsd.gov.hk/
  
• Operation and Maintenance Best Practices Booklets & Handbooks 優良操作和維修作業守則及手冊 https://www.emsd.gov.hk/en/publications/emsd_operation_maintenance_best_practices_booklets/
  
• Retro-commissioning Resources Centre 重新校驗資源中心 https://www.rcxrc.emsd.gov.hk/
  

Retro-commissioning (RCx):

• ASHRAE-HKC Webpage for Building Commissioning http://www.ashrae-hkc.org/Retrocommissioning.html
• EMSD Retro-commissioning Resources Centre https://www.rcxrc.emsd.gov.hk/
• Retro-commissioning (RCx) - Energy Saving for All  重新校驗 - 全民節能 https://www.energysaving.gov.hk/en/retro_commissioning_rcx/
• Retro-Commissioning: Significant Savings at Minimal Cost https://buildingefficiencyinitiative.org/articles/retro-commissioning-significant-savings-minimal-cost
• Videos:
• Retro-Commissioning 101 (1:32) https://youtu.be/PmmGJsDjM_c
• Retro-Commissioning Process And Implementation In Healthcare Facilities II (1:18) https://youtu.be/xbHiCe5gm2c
  
• Retro-Commissioning Your Facility (4:37) https://youtu.be/4rIeGfUrxQA
• What is Retro Commissioning? (1:24) https://youtu.be/Yp_4x2G22Kc
• 【星星話】「逆 流大廈」： 重新校驗 省電慳錢 (3:45) https://youtu.be/BS7F2azp5Mo
• 政府建築物的節 能目標與重新校驗 (3:16) https://youtu.be/lU90Gap1Lig