ISTA Mielke GmbH & Mielke, T. (1997). Oil world annual 1997. ISTA Mielke GmbH.
Chicago Style (17th ed.) CitationISTA Mielke GmbH and Thomas Mielke. Oil World Annual 1997. Hamburg: ISTA Mielke GmbH, 1997.
MLA (9th ed.) CitationISTA Mielke GmbH and Thomas Mielke. Oil World Annual 1997. ISTA Mielke GmbH, 1997.
Warning: These citations may not always be 100% accurate.