Gaya APA
Alexander, L.G.. (1978).
New concept english : developing skills .
Gorontalo:
Kanisius.
Gaya Chicago
Alexander, L.G..
New concept english : developing skills.
Gorontalo:
Kanisius,
1978.
Text.
Gaya MLA
Alexander, L.G..
New concept english : developing skills.
Gorontalo:
Kanisius,
1978.
Text.
Gaya Turabian
Alexander, L.G..
New concept english : developing skills.
Gorontalo:
Kanisius,
1978.
Print.