APA Style
Challenge : Level 6. (2000).
Ohio:
McGraw-Hill.
Chicago Style
Challenge : Level 6.
Teacher's Edition.
Ohio:
McGraw-Hill,
2000.
Printed Book.
MLA Style
Challenge : Level 6.
Teacher's Edition.
Ohio:
McGraw-Hill,
2000.
Printed Book.
Turabian Style
Challenge : Level 6.
Ohio:
McGraw-Hill,
2000.
Printed Book.