Gaya APA
Napa, Pieter A.. (1991).
Basic English Grammar (Cet. 1).
Yogyakarta:
PT Kanisius.
Gaya Chicago
Napa, Pieter A..
Basic English Grammar.
Cet. 1
Yogyakarta:
PT Kanisius,
1991.
Text.
Gaya MLA
Napa, Pieter A..
Basic English Grammar.
Cet. 1
Yogyakarta:
PT Kanisius,
1991.
Text.
Gaya Turabian
Napa, Pieter A..
Basic English Grammar.
Cet. 1
Yogyakarta:
PT Kanisius,
1991.
Print.