Gaya APA
Powell, John. (1989).
Happiness Is An Inside Job .
California:
Tabor Publishing.
Gaya Chicago
Powell, John.
Happiness Is An Inside Job.
California:
Tabor Publishing,
1989.
Text.
Gaya MLA
Powell, John.
Happiness Is An Inside Job.
California:
Tabor Publishing,
1989.
Text.
Gaya Turabian
Powell, John.
Happiness Is An Inside Job.
California:
Tabor Publishing,
1989.
Print.