Gaya APA
Fatahillah, M., Hermawan, D.
(2006).
Bahagia Tanpa Stress
.
Surakarta:
SmartMedia.
Gaya MLA
Fatahillah, Muhammad., Hermawan, Didik.
"Bahagia Tanpa Stress".
Surakarta:
SmartMedia,
2006.
Book.