Gaya APA
Kusuma, W.
(2006).
Prosedur penelitian: Suatu pendekatan praktek
.
Jakarta:
Rineka Cipta.
Gaya MLA
Kusuma, Widjaja.
"Prosedur penelitian: Suatu pendekatan praktek".
Jakarta:
Rineka Cipta,
2006.
Printed Book.