Gaya APA
LOU, R. (2007).
TOEFL Common Errors and Grammar Practice: The book that makes you score higher .
Jakarta:
EPlus Mobile English.
Gaya MLA
LOU, Robby.
"TOEFL Common Errors and Grammar Practice: The book that makes you score higher".
Jakarta:
EPlus Mobile English,
2007.
Buku.