Cita APA (7th ed.)

NAPA, P. A. (1994). Basic english exercise. Kanisius.

Cita Chicago (17th ed.)

NAPA, Pieter A. Basic English Exercise. Yogyakarta: Kanisius, 1994.

Cita MLA (9th ed.)

NAPA, Pieter A. Basic English Exercise. Kanisius, 1994.