ISTA Mielke GmbH. (1998). Oil world annual 1998. ISTA Mielke GmbH.
Chicago Style (17th ed.) CitationISTA Mielke GmbH. Oil World Annual 1998. Hamburg: ISTA Mielke GmbH, 1998.
MLA (9th ed.) CitationISTA Mielke GmbH. Oil World Annual 1998. ISTA Mielke GmbH, 1998.
Warning: These citations may not always be 100% accurate.