American National Standards Institute. (2008). Welding inspection technology sample CWI fundamentals examination (Tái bản lần thứ 5.). America: American Welding Society.
শিকাগো স্টাইলে সাইটেশনAmerican National Standards Institute. Welding Inspection Technology Sample CWI Fundamentals Examination. Tái bản lần thứ 5. America: American Welding Society, 2008.
এমএলএ সাইটেশনAmerican National Standards Institute. Welding Inspection Technology Sample CWI Fundamentals Examination. Tái bản lần thứ 5. America: American Welding Society, 2008.
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