Gaya APA

Griffin, I, H., Roden, E, M. (1985). Pipe Welding Techniques (4). United States of America: Delmar Cengage Learning.

Gaya MLA

Griffin, Ivan, H.., Roden, Edward, M.. "Pipe Welding Techniques". 4 United States of America: Delmar Cengage Learning, 1985. Text.