Cita APA (7a ed.)

ISTA Mielke GmbH. (1994). Oil world annual 1994. ISTA Mielke GmbH.

Cita Chicago Style (17a ed.)

ISTA Mielke GmbH. Oil World Annual 1994. Hamburg: ISTA Mielke GmbH, 1994.

Cita MLA (9a ed.)

ISTA Mielke GmbH. Oil World Annual 1994. ISTA Mielke GmbH, 1994.