APA aipamena

American National Standards Institute. (1993). Standard for AWS Certified Welders. American: American Welding Society.

Chicago Style aipamena

American National Standards Institute. Standard for AWS Certified Welders. American: American Welding Society, 1993.

MLA aipamena

American National Standards Institute. Standard for AWS Certified Welders. American: American Welding Society, 1993.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.