Gaya APA
Nikolay, H.
(2015).
SELLING EASILY AND SMARTLY
(
cet. 4)
.
JAKARTA:
Gramedia Pustaka Utama.
Gaya MLA
Nikolay, Hingdranata.
"SELLING EASILY AND SMARTLY".
cet. 4
JAKARTA:
Gramedia Pustaka Utama,
2015.
Text.