Gaya APA

Petroleum., T, I, O. (1968). IP Standards for petroleum and its products. part I section 1. IP methods 1 to 143 (1968). : London : The Institute of Petroleum,.

Gaya MLA

Petroleum., The, Institute, Of. "IP Standards for petroleum and its products. part I section 1. IP methods 1 to 143". 1968 : London : The Institute of Petroleum,, 1968. Text.