Gaya APA
LOU, R.
(2009).
Robby Lou's TOEFL Preparation Guide 2nd Edition
(
2)
.
:
EPlus Mobile English.
Gaya MLA
LOU, Robby.
"Robby Lou's TOEFL Preparation Guide 2nd Edition".
2
:
EPlus Mobile English,
2009.
Buku.