Gaya APA
Rubin, Gretchen. (2010).
The Happines Project: Proyek Kebahagiaan .
Jakarta:
Gramedia.
Gaya Chicago
Rubin, Gretchen.
The Happines Project: Proyek Kebahagiaan.
Jakarta:
Gramedia,
2010.
Printed Book.
Gaya MLA
Rubin, Gretchen.
The Happines Project: Proyek Kebahagiaan.
Jakarta:
Gramedia,
2010.
Printed Book.
Gaya Turabian
Rubin, Gretchen.
The Happines Project: Proyek Kebahagiaan.
Jakarta:
Gramedia,
2010.
Printed Book.