Penggayaan APA
O'CONNELL, Sue. (2007).
Focus on IELTS : (6th ed.).
England:
Pearson Longman.
Chicago Style
O'CONNELL, Sue.
Focus on IELTS :.
6th ed.
England:
Pearson Longman,
2007.
Buku.
MLA Style
O'CONNELL, Sue.
Focus on IELTS :.
6th ed.
England:
Pearson Longman,
2007.
Buku.
Turabian Style
O'CONNELL, Sue.
Focus on IELTS :.
6th ed.
England:
Pearson Longman,
2007.
Buku.