Gaya APA

(API), A, P, I. (1988). Recommended practice for flexible pipe. API Recommended Practice 17B (RP 17B). (1984). : Washington DC : American Petroleum Inst.,.

Gaya MLA

(API), American, Petrol., Inst.. "Recommended practice for flexible pipe. API Recommended Practice 17B (RP 17B).". 1984 : Washington DC : American Petroleum Inst.,, 1988. Text.