(2008). Specification for Welding Procedure and Performance Qualification. American: Ametican Welding Society.
Trích dẫn kiểu ChicagoSpecification for Welding Procedure and Performance Qualification. American: Ametican Welding Society, 2008.
ציטוט MLASpecification for Welding Procedure and Performance Qualification. American: Ametican Welding Society, 2008.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.