Gaya APA
Singgih, Y.
(2017).
Never too Young to Became a Billionaire
(
ed. 1. cet. 5.)
.
Jakarta:
Gramedia.
Gaya MLA
Singgih, Yasa.
"Never too Young to Became a Billionaire".
ed. 1. cet. 5.
Jakarta:
Gramedia,
2017.
Buku.