APA Format
Napa, Pieter A. (1992).
Basic English execises / Pieter A. Napa
. Yogyakarta :: Kanisius,.
MLA Format
Napa, Pieter A.
Basic English execises / Pieter A. Napa
. Yogyakarta :: Kanisius,, 1992
Chicago Format
Napa, Pieter A. Basic English execises / Pieter A. Napa. Yogyakarta :: Kanisius,, 1992.