Gaya APA
Joko, D, S., [ed.], A, J. (2015).
Top secret sales magic taklukkan kompetitor anda .
Yogyakarta:
Smart Pustaka.
Gaya MLA
Joko, DWI, SANTOSA,., [ed.], ADI, J..
"Top secret sales magic taklukkan kompetitor anda".
Yogyakarta:
Smart Pustaka,
2015.
Buku.