Gaya APA
Alexander, L.G. (1990).
New Concept English .
Yogyakarta:
Kanisius.
Gaya Chicago
Alexander, L.G.
New Concept English.
Yogyakarta:
Kanisius,
1990.
Text.
Gaya MLA
Alexander, L.G.
New Concept English.
Yogyakarta:
Kanisius,
1990.
Text.
Gaya Turabian
Alexander, L.G.
New Concept English.
Yogyakarta:
Kanisius,
1990.
Print.