Gaya APA
FERRISS, T., INDRIANI, F.
(2011).
THE 4-HOUR WORKWEEK
.
Jakarta:
GAGASMEDIA.
Gaya MLA
FERRISS, TIMOTHY., INDRIANI, FEBY.
"THE 4-HOUR WORKWEEK".
Jakarta:
GAGASMEDIA,
2011.
.