APA Style
Haris, Michael. (2007).
Challenges 2 - Student Book .
:
Longman.
Chicago Style
Haris, Michael.
Challenges 2 - Student Book.
:
Longman,
2007.
.
MLA Style
Haris, Michael.
Challenges 2 - Student Book.
:
Longman,
2007.
.
Turabian Style
Haris, Michael.
Challenges 2 - Student Book.
:
Longman,
2007.
.