National Center for Construction Education and Research. (1993). Instructor's guide [to accompany] Welding: Level 3. Prentice Hall.
芝加哥风格引文National Center for Construction Education and Research. Instructor's Guide [to Accompany] Welding: Level 3. Upper Saddle River, NJ: Prentice Hall, 1993.
MLA引文National Center for Construction Education and Research. Instructor's Guide [to Accompany] Welding: Level 3. Prentice Hall, 1993.
警告：这些引文格式不一定是100％准确.