Gaya APA
Ries, A., Trout, J.
(2002).
POSITIONING : THE BATTLE FOR YOUR MIND
.
Jakarta:
Salemba Empat.
Gaya MLA
Ries, A1., Trout, Jack.
"POSITIONING : THE BATTLE FOR YOUR MIND".
Jakarta:
Salemba Empat,
2002.
Text.