Gaya APA
Budiman, D., Freefik, .
(2017).
Sales Insight : Spirit, Strategi, Service
.
Jakarta:
Gramedia Pustaka Utama.
Gaya MLA
Budiman, Dedy., Freefik, .
"Sales Insight : Spirit, Strategi, Service".
Jakarta:
Gramedia Pustaka Utama,
2017.
Text.