Gaya APA
ALEXANDER, L.G.. (1994).
New concept english : first things first .
Jogja:
Kanisius.
Gaya Chicago
ALEXANDER, L.G..
New concept english : first things first.
Jogja:
Kanisius,
1994.
Text.
Gaya MLA
ALEXANDER, L.G..
New concept english : first things first.
Jogja:
Kanisius,
1994.
Text.
Gaya Turabian
ALEXANDER, L.G..
New concept english : first things first.
Jogja:
Kanisius,
1994.
Print.