Gaya APA

(API), A, P, I. (1992). Specification for line pipe Welding of pipelines and related facilities API Specification 5L (Spec 5L) API Standard 1104 (1992). : Washington DC : American Petroleum Inst.,.

Gaya MLA

(API), American, Petrol., Inst.. "Specification for line pipe Welding of pipelines and related facilities API Specification 5L (Spec 5L) API Standard 1104". 1992 : Washington DC : American Petroleum Inst.,, 1992. Text.