ISO & International Organization for Standardization. (2012). International Standard ISO 9712: Non-destructive testing. Qualification and certification of NDT personnel (4a. ed.). International Organization for Standardization.
Chicago-referens (17:e uppl.)ISO och International Organization for Standardization. International Standard ISO 9712: Non-destructive Testing. Qualification and Certification of NDT Personnel. 4a. ed. Ginebra: International Organization for Standardization, 2012.
MLA-referens (9:e uppl.)ISO och International Organization for Standardization. International Standard ISO 9712: Non-destructive Testing. Qualification and Certification of NDT Personnel. 4a. ed. International Organization for Standardization, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.