WHO International Working Group for Drug Statistics Methodology (Agustus 27, 2008). "ATC/DDD Classification (FINAL): New ATC 5th level codes". WHO Collaborating Centre for Drug Statistics Methodology. Diarsipkan dari asli tanggal Mei 6, 2008. Diakses tanggal September 5, 2008.
WHO International Working Group for Drug Statistics Methodology (Agustus 27, 2008). "ATC/DDD Classification (FINAL): New ATC 5th level codes". WHO Collaborating Centre for Drug Statistics Methodology. Diarsipkan dari asli tanggal Mei 6, 2008. Diakses tanggal September 5, 2008.