Gaya APA
Spelling Level 3. (1999).
New York:
Mc Graw Hill.
Gaya Chicago
Spelling Level 3.
.
New York:
Mc Graw Hill,
1999.
Printed Book.
Gaya MLA
Spelling Level 3.
.
New York:
Mc Graw Hill,
1999.
Printed Book.
Gaya Turabian
Spelling Level 3.
New York:
Mc Graw Hill,
1999.
Printed Book.