Gaya APA
Singgih, Y., Andika, R, Y. (2017).
Never Too Young To Become a Billionaire .
Jakarta:
ELex Media Komputindo.
Gaya MLA
Singgih, Yasa., Andika, Roby, Yonki.
"Never Too Young To Become a Billionaire".
Jakarta:
ELex Media Komputindo,
2017.
Book.