Gaya APA

Eng, N, A, C. (1995). Recomended practice control of external corrosion on underground or submerged metallic piping systems (1996). Houston,Texas: Houston: National Ass. of Corrosion Eng.,.

Gaya MLA

Eng, National, Ass.of, Corrosion. "Recomended practice control of external corrosion on underground or submerged metallic piping systems". 1996 Houston,Texas: Houston: National Ass. of Corrosion Eng.,, 1995. Text.