Gaya APA

Ass., N, F, P. (2001). NFPA 58 liquefied petroleum gas code (2001). : Quincy : NFPA ,.

Gaya MLA

Ass., National, Fire, Protec.. "NFPA 58 liquefied petroleum gas code". 2001 : Quincy : NFPA ,, 2001. Text.