Gaya APA
Boen, B.
(2017).
Young on top updated (YOT) : 40 kunci sukses di usia muda
(
edisi 2)
.
Yogyakarta:
B first.
Gaya MLA
Boen, Billy.
"Young on top updated (YOT) : 40 kunci sukses di usia muda".
edisi 2
Yogyakarta:
B first,
2017.
Text.