Gaya APA

Eng, N, A, O, C. (1995). Recomended pratice control of external corrosin on underground or submerged metallic piping system (1996). Housto, Texas: Houston ; National ass o corrosin Eng.

Gaya MLA

Eng, National, Ass., Of, Corrosin. "Recomended pratice control of external corrosin on underground or submerged metallic piping system". 1996 Housto, Texas: Houston ; National ass o corrosin Eng, 1995. Text.