Gaya APA
Kilbey, Liz. (2007).
Challenges Workbook 2 (Cet 1).
New York:
Pearson Longman.
Gaya Chicago
Kilbey, Liz.
Challenges Workbook 2.
Cet 1
New York:
Pearson Longman,
2007.
Text.
Gaya MLA
Kilbey, Liz.
Challenges Workbook 2.
Cet 1
New York:
Pearson Longman,
2007.
Text.
Gaya Turabian
Kilbey, Liz.
Challenges Workbook 2.
Cet 1
New York:
Pearson Longman,
2007.
Print.