Gaya APA
Learning English on Computer. (1998).
London:
Longman.
Gaya Chicago
Learning English on Computer.
~.
London:
Longman,
1998.
Buku.
Gaya MLA
Learning English on Computer.
~.
London:
Longman,
1998.
Buku.
Gaya Turabian
Learning English on Computer.
London:
Longman,
1998.
Buku.