Gaya APA
Alexander, L., Muslich, M. (1998).
New Concept English Practice And Progress: Supplementary Written Exercise .
Yogyakarta:
Kanisius.
Gaya MLA
Alexander, L.G.., Muslich, Masnur.
"New Concept English Practice And Progress: Supplementary Written Exercise".
Yogyakarta:
Kanisius,
1998.
Text.