Gaya APA
One hundred useful exercises in english. (1991).
Malang:
Gelatik.
Gaya Chicago
One hundred useful exercises in english.
.
Malang:
Gelatik,
1991.
Text.
Gaya MLA
One hundred useful exercises in english.
.
Malang:
Gelatik,
1991.
Text.
Gaya Turabian
One hundred useful exercises in english.
Malang:
Gelatik,
1991.
Print.