APA Style
OPEC: Its Role and Influence since
1960. ().
:
.
Chicago Style
OPEC: Its Role and Influence since
1960.
third edition.
:
,
.
Text.
MLA Style
OPEC: Its Role and Influence since
1960.
third edition.
:
,
.
Text.
Turabian Style
OPEC: Its Role and Influence since
1960.
:
,
.
Print.