Gaya APA
Ratcliffe, K. (2008).
Journey to the Moon: 5 SFLEP Longman Secondary English Graded Readers .
Hong Kong:
Pearson Longman.
Gaya MLA
Ratcliffe, Katherine.
"Journey to the Moon: 5 SFLEP Longman Secondary English Graded Readers".
Hong Kong:
Pearson Longman,
2008.
Karya Cetak.