Gaya APA
Mansur, Yusuf. (2012).
The secret of a happy life .
Jakarta:
Zikrul.
Gaya Chicago
Mansur, Yusuf.
The secret of a happy life.
Jakarta:
Zikrul,
2012.
Text.
Gaya MLA
Mansur, Yusuf.
The secret of a happy life.
Jakarta:
Zikrul,
2012.
Text.
Gaya Turabian
Mansur, Yusuf.
The secret of a happy life.
Jakarta:
Zikrul,
2012.
Print.