Cita APA (7a ed.)

ISTA Mielke GmbH. (1999). Oil world 2020: Supply, demand and prices from 1976 through 2020. ISTA Mielke GmbH.

Cita Chicago Style (17a ed.)

ISTA Mielke GmbH. Oil World 2020: Supply, Demand and Prices from 1976 Through 2020. Hamburg: ISTA Mielke GmbH, 1999.

Cita MLA (9a ed.)

ISTA Mielke GmbH. Oil World 2020: Supply, Demand and Prices from 1976 Through 2020. ISTA Mielke GmbH, 1999.