Gaya APA
Alexander, I.G.. (1978).
New Concept English .
Yogyakarta:
Kanisius.
Gaya Chicago
Alexander, I.G..
New Concept English.
Yogyakarta:
Kanisius,
1978.
Text.
Gaya MLA
Alexander, I.G..
New Concept English.
Yogyakarta:
Kanisius,
1978.
Text.
Gaya Turabian
Alexander, I.G..
New Concept English.
Yogyakarta:
Kanisius,
1978.
Print.