Gaya APA
Alexander, L.G.. (1973).
Mainline : Progress B .
London:
Longman Group.
Gaya Chicago
Alexander, L.G..
Mainline : Progress B.
London:
Longman Group,
1973.
Text.
Gaya MLA
Alexander, L.G..
Mainline : Progress B.
London:
Longman Group,
1973.
Text.
Gaya Turabian
Alexander, L.G..
Mainline : Progress B.
London:
Longman Group,
1973.
Print.