Gaya APA
Alexander, L.G.. (1991).
New Concept English Practice and Progress (ed.7).
Yogyakarta:
Kanisius.
Gaya Chicago
Alexander, L.G..
New Concept English Practice and Progress.
ed.7
Yogyakarta:
Kanisius,
1991.
.
Gaya MLA
Alexander, L.G..
New Concept English Practice and Progress.
ed.7
Yogyakarta:
Kanisius,
1991.
.
Gaya Turabian
Alexander, L.G..
New Concept English Practice and Progress.
ed.7
Yogyakarta:
Kanisius,
1991.
.