Gaya APA
NAPA, P, A.
(2003).
BASIC ENGLISH EXERCISES / Pieter A. Napa
(
Cet.ke-7)
.
Yogyakarta:
Kanisius.
Gaya MLA
NAPA, Pieter, A..
"BASIC ENGLISH EXERCISES / Pieter A. Napa".
Cet.ke-7
Yogyakarta:
Kanisius,
2003.
Text.