Independent analysts and forecasters. (2017). Oil World. ISTA Mielke GmbH.
Citação do estilo Chicago (17ª ed.)Independent analysts and forecasters. Oil World. Hamburg, Alemanha: ISTA Mielke GmbH, 2017.
Citação MLA (8ª ed.)Independent analysts and forecasters. Oil World. ISTA Mielke GmbH, 2017.
警告：这些引文格式不一定是100％准确.