Conformity assessment - Requirements for bodies providing audit and certification of management systems (ISO/IEC 17021:2011); German and English version EN ISO/IEC 17021:2011— 89 стр.
Conformity assessment - Requirements for bodies providing audit and certification of management systems - Part 1: Requirements (ISO/IEC 17021-1:2015); German and English version EN ISO/IEC 17021-1:2015— 97 стр.