APA Style
Challenge : Level 4. (2000).
Ohio:
McGraw-Hill.
Chicago Style
Challenge : Level 4.
.
Ohio:
McGraw-Hill,
2000.
Printed Book.
MLA Style
Challenge : Level 4.
.
Ohio:
McGraw-Hill,
2000.
Printed Book.
Turabian Style
Challenge : Level 4.
Ohio:
McGraw-Hill,
2000.
Printed Book.