Gaya APA
Christiansen, T.
(2005).
Attitude Plus! : Tony Christiansen's Secrets Of Succes
.
Jakarta:
Bhuana Ilmu Populer.
Gaya MLA
Christiansen, Tony.
"Attitude Plus! : Tony Christiansen's Secrets Of Succes".
Jakarta:
Bhuana Ilmu Populer,
2005.
Text.