Gaya APA

Jeffus, L., Bower, L. (2010). Welding : Skills, Processes and Practices for Entry-Level Welders : Book Three (Ed. 1). USA: Penerbit Delmar, Cengage Learning.

Gaya MLA

Jeffus, Larry., Bower, Lawrence. "Welding : Skills, Processes and Practices for Entry-Level Welders : Book Three". Ed. 1 USA: Penerbit Delmar, Cengage Learning, 2010. Text.