Cita APA (7a ed.)

ISTA Mielke GmbH & Mielke, T. (1993). Oil World Annual 1993. ISTA Mielke GmbH.

Cita Chicago Style (17a ed.)

ISTA Mielke GmbH y Thomas Mielke. Oil World Annual 1993. Hamburg: ISTA Mielke GmbH, 1993.

Cita MLA (9a ed.)

ISTA Mielke GmbH y Thomas Mielke. Oil World Annual 1993. ISTA Mielke GmbH, 1993.