Gaya APA

(API), A, P, I. (1978). Specification for Oil Field V Belting. API Specification 1B (Spec 1B) (1978). : Washington DC : American Petroleum Inst.,.

Gaya MLA

(API), American, Petrol., Inst.. "Specification for Oil Field V Belting. API Specification 1B (Spec 1B)". 1978 : Washington DC : American Petroleum Inst.,, 1978. Text.