Gaya APA
NAPA, P, A.
(2003).
How to answer english questions/ Pieter A. Napa
.
Yogyakarta:
Kanisius.
Gaya MLA
NAPA, Pieter, A..
"How to answer english questions/ Pieter A. Napa".
Yogyakarta:
Kanisius,
2003.
Text.