Gaya APA
Alexander, L.G.. (1979).
Mainline : Progress A .
London:
Longman Group.
Gaya Chicago
Alexander, L.G..
Mainline : Progress A.
London:
Longman Group,
1979.
Text.
Gaya MLA
Alexander, L.G..
Mainline : Progress A.
London:
Longman Group,
1979.
Text.
Gaya Turabian
Alexander, L.G..
Mainline : Progress A.
London:
Longman Group,
1979.
Print.