APA Style
porter, michael e. (1980).
COMPETITIVE STRATEGY .
:
.
Chicago Style
porter, michael e.
COMPETITIVE STRATEGY .
:
,
1980.
Text.
MLA Style
porter, michael e.
COMPETITIVE STRATEGY .
:
,
1980.
Text.
Turabian Style
porter, michael e.
COMPETITIVE STRATEGY .
:
,
1980.
Print.