Gaya APA
Ratcliffe, K. (2008).
Cyberspace: 9 SFLEP Longman Secondary English Graded Readers .
Hong Kong:
Pearson Longman.
Gaya MLA
Ratcliffe, Katherine.
"Cyberspace: 9 SFLEP Longman Secondary English Graded Readers".
Hong Kong:
Pearson Longman,
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Karya Cetak.