Gaya APA
Lingga, H, D., H.S, N. (2007).
Advanced english grammar for TOEFL Preparation (Cet.2).
Jakarta:
Puspa Swara.
Gaya MLA
Lingga, Hotben, D.., H.S, Nino.
"Advanced english grammar for TOEFL Preparation".
Cet.2
Jakarta:
Puspa Swara,
2007.
Textbook.