Gaya APA
Pradiansyah, Arvan. (2009).
The 7 laws of happiness .
Bandung:
Kaifa.
Gaya Chicago
Pradiansyah, Arvan.
The 7 laws of happiness.
Bandung:
Kaifa,
2009.
Text.
Gaya MLA
Pradiansyah, Arvan.
The 7 laws of happiness.
Bandung:
Kaifa,
2009.
Text.
Gaya Turabian
Pradiansyah, Arvan.
The 7 laws of happiness.
Bandung:
Kaifa,
2009.
Print.