APA Style
Oil World Vol. 56 No. 22 / 31 May 2013. (2013).
Germany:
ISTA Mielke GmbH.
Chicago Style
Oil World Vol. 56 No. 22 / 31 May 2013.
1.
Germany:
ISTA Mielke GmbH,
2013.
Hard Copy.
MLA Style
Oil World Vol. 56 No. 22 / 31 May 2013.
1.
Germany:
ISTA Mielke GmbH,
2013.
Hard Copy.
Turabian Style
Oil World Vol. 56 No. 22 / 31 May 2013.
Germany:
ISTA Mielke GmbH,
2013.
Hard Copy.