APA Style
Sahanaya, W., Hugbes, T. (2002).
IELTS: preparation and practice tests with annotated answer key .
Melbourne:
Oxford University.
MLA Style
Sahanaya, Wendy., Hugbes, Terri.
"IELTS: preparation and practice tests with annotated answer key".
Melbourne:
Oxford University,
2002.
Bahasa Inggris.