Gaya APA
Sukur, S, G.
(2016).
TOEFL Grammar Guide Book For Beginners Target Skor 600
.
Yogyakarta:
Galangpress.
Gaya MLA
Sukur, Silvester, Goridus.
"TOEFL Grammar Guide Book For Beginners Target Skor 600".
Yogyakarta:
Galangpress,
2016.
Text.