Gaya APA
R., P.
(2006).
30 Menit Essay Writing,Writing is Easy
(
Ed.1)
.
Yogyakarta:
Andi.
Gaya MLA
R., Pramono,Peni.
"30 Menit Essay Writing,Writing is Easy".
Ed.1
Yogyakarta:
Andi,
2006.
Textbook.