Gaya APA
The Simple Way to Happiness. (2017).
Yogyakarta:
psikologi corner.
Gaya Chicago
The Simple Way to Happiness.
.
Yogyakarta:
psikologi corner,
2017.
Text.
Gaya MLA
The Simple Way to Happiness.
.
Yogyakarta:
psikologi corner,
2017.
Text.
Gaya Turabian
The Simple Way to Happiness.
Yogyakarta:
psikologi corner,
2017.
Print.