Gaya APA
Hartanto, J, S., Koentjoro, S.
(2003).
Accurate, brief and clear english grammar
(
1)
.
Surabaya:
Indah.
Gaya MLA
Hartanto, John, S.., Koentjoro, S..
"Accurate, brief and clear english grammar".
1
Surabaya:
Indah,
2003.
Text.