Gaya APA

(API), A, P, I. (1976). Recommended practice for care and use of reinforced thermosetting resin line pipe (RTRP). API Recommended Practice 15L 4 (RP 15L 4) (1976). : Washington DC : American Petroleum Inst.,.

Gaya MLA

(API), American, Petrol., Inst.. "Recommended practice for care and use of reinforced thermosetting resin line pipe (RTRP). API Recommended Practice 15L 4 (RP 15L 4)". 1976 : Washington DC : American Petroleum Inst.,, 1976. Text.