Gaya APA
Napa, P, A.
(1994).
Basic English Exercises
(
Cet. 2.--)
.
Yogyakarta:
Kanisus.
Gaya MLA
Napa, Pieter, A..
"Basic English Exercises".
Cet. 2.--
Yogyakarta:
Kanisus,
1994.
Text.