Gaya APA
Lou, R. (2007).
Robby Lous's: Toefl Preparation Guide English Grammar=the Book You Wouldn't Want to Miss (Cet. 1.--).
S.n.:
E Plus.
Gaya MLA
Lou, Robby.
"Robby Lous's: Toefl Preparation Guide English Grammar=the Book You Wouldn't Want to Miss".
Cet. 1.--
S.n.:
E Plus,
2007.
Text.