Gaya APA
R., G.
(2011).
How To Win Friend And Influence People In The Didital Age
.
Bogor:
Sabak Grip Nusantara.
Gaya MLA
R., Goebahan.
"How To Win Friend And Influence People In The Didital Age".
Bogor:
Sabak Grip Nusantara,
2011.
Text.