APA Style
Humpreys, Pamela, Cullen, Pauline. (2006).
IELTS Express. Upper Intermediate. Workbook .
:
Prentice Hall.
Chicago Style
Humpreys, Pamela, Cullen, Pauline.
IELTS Express. Upper Intermediate. Workbook.
:
Prentice Hall,
2006.
print.
MLA Style
Humpreys, Pamela, Cullen, Pauline.
IELTS Express. Upper Intermediate. Workbook.
:
Prentice Hall,
2006.
print.
Turabian Style
Humpreys, Pamela, Cullen, Pauline.
IELTS Express. Upper Intermediate. Workbook.
:
Prentice Hall,
2006.
print.