Gaya APA
Mas'ud, F.
(2005).
Essentials of english grammar: a practical guide
.
Yogyakarta:
BPFE UGM.
Gaya MLA
Mas'ud, Fuad.
"Essentials of english grammar: a practical guide".
Yogyakarta:
BPFE UGM,
2005.
Text.