Gaya APA
Trout, J., Rivkin, S.
(1999).
The Power Of Simplicity
.
Yogyakarta:
Salemba Empat.
Gaya MLA
Trout, Jack., Rivkin, Steve.
"The Power Of Simplicity".
Yogyakarta:
Salemba Empat,
1999.
Text.