Gaya APA
Mansur, U, Y.
(2013).
How to Enjoy Your Life
.
Jakarta Timur:
Wiasata Hati.
Gaya MLA
Mansur, USt., Yusuf.
"How to Enjoy Your Life".
Jakarta Timur:
Wiasata Hati,
2013.
Buku Referensi.