Gaya APA

(API), A, P, I. (1990). Specification for drilling and production hoisting equipment (PSL 1 and PSL 2) API Specification 8C (Spec 8C) (1990). : Washington DC : American Petroleum Inst.,.

Gaya MLA

(API), American, Petrol., Inst.. "Specification for drilling and production hoisting equipment (PSL 1 and PSL 2) API Specification 8C (Spec 8C)". 1990 : Washington DC : American Petroleum Inst.,, 1990. Text.