American National Standards Institute. (1993). Recommended Practice for the Training, Qualification and Certification of Welding Inspector Specialist and Welding Inspector Assistant. American: American Welding Society.
Dyfyniad Arddull ChicagoAmerican National Standards Institute. Recommended Practice for the Training, Qualification and Certification of Welding Inspector Specialist and Welding Inspector Assistant. American: American Welding Society, 1993.
Dyfyniad MLAAmerican National Standards Institute. Recommended Practice for the Training, Qualification and Certification of Welding Inspector Specialist and Welding Inspector Assistant. American: American Welding Society, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.