Gaya APA
SINGGIH, Y.
(2017).
NEVER TOO YOUNG TO BECOME A BILLIONAIRE
.
Jakarta:
PT Elex Media Komputindo.
Gaya MLA
SINGGIH, YASA.
"NEVER TOO YOUNG TO BECOME A BILLIONAIRE".
Jakarta:
PT Elex Media Komputindo,
2017.
Text.