Gaya APA
Santosa, J, D.
(2015).
Top Secret Sales Magic: Taklukkan Kompetitor Anda
.
Yogyakarta:
Smart Pustaka.
Gaya MLA
Santosa, Joko, Dwi.
"Top Secret Sales Magic: Taklukkan Kompetitor Anda".
Yogyakarta:
Smart Pustaka,
2015.
Text.