APA (7th ed.) Citation

ISTA Mielke GmbH & Mielke, T. (1991). Oil world annual 1991. ISTA Mielke GmbH.

Chicago Style (17th ed.) Citation

ISTA Mielke GmbH and Thomas Mielke. Oil World Annual 1991. Hamburg: ISTA Mielke GmbH, 1991.

MLA (9th ed.) Citation

ISTA Mielke GmbH and Thomas Mielke. Oil World Annual 1991. ISTA Mielke GmbH, 1991.

Warning: These citations may not always be 100% accurate.