Gaya APA

NFPA 51B STANDARD FOR FIRE PREVENTION DURING WELDING, CUTTING, AND OTHER HOT WORK. (1999). : NATIONAL FIRE PROTECTION ASSOCIATION.

Gaya MLA

NFPA 51B STANDARD FOR FIRE PREVENTION DURING WELDING, CUTTING, AND OTHER HOT WORK. . : NATIONAL FIRE PROTECTION ASSOCIATION, 1999. Text.