"Table of blood group systems". International Society of Blood Transfusion. 2006. Retrieved 2006-11-14. {{cite web}}: Unknown parameter |month= ignored (|date= suggested) (help)
ibgrl.blood.co.uk
ISBT Committee on Terminology for Red Cell Surface Antigens. "Terminology Home Page". Archived from the original on 2016-03-03. Retrieved 2009-02-13.
web.archive.org
ISBT Committee on Terminology for Red Cell Surface Antigens. "Terminology Home Page". Archived from the original on 2016-03-03. Retrieved 2009-02-13.
