Gaya APA

(API), A, P, I. (1987). Specification for thermoplastic line pipe (PVC and CPVC). API Specification 15LP (Spec 15LP) (1987). : Washington DC : American Petroleum Inst.,.

Gaya MLA

(API), American, Petrol., Inst.. "Specification for thermoplastic line pipe (PVC and CPVC). API Specification 15LP (Spec 15LP)". 1987 : Washington DC : American Petroleum Inst.,, 1987. Text.