Gaya APA
Winarta, B, T.
(2017).
500 Ways to Multiply Your People's Productivity
.
Jakarta:
Elex Media Komputindo.
Gaya MLA
Winarta, Barliant, T..
"500 Ways to Multiply Your People's Productivity".
Jakarta:
Elex Media Komputindo,
2017.
Buku.