Gaya APA
Adi, M, R.
(1990).
A Rapid Course In English For Students Of economics
.
Kebumen:
Muassasah Ar-Risalah.
Gaya MLA
Adi, Muhammad, Ramdhan.
"A Rapid Course In English For Students Of economics".
Kebumen:
Muassasah Ar-Risalah,
1990.
Text.