Gaya APA
Sales Insight (Spirit, Strategy, Service). (2017).
Jakarta:
PT Gramedia Pustaka Utama.
Gaya Chicago
Sales Insight (Spirit, Strategy, Service).
.
Jakarta:
PT Gramedia Pustaka Utama,
2017.
Buku.
Gaya MLA
Sales Insight (Spirit, Strategy, Service).
.
Jakarta:
PT Gramedia Pustaka Utama,
2017.
Buku.
Gaya Turabian
Sales Insight (Spirit, Strategy, Service).
Jakarta:
PT Gramedia Pustaka Utama,
2017.
Buku.