Gaya APA
Signature reading level E. (2005).
New York:
Mc Graw-Hill.
Gaya Chicago
Signature reading level E.
.
New York:
Mc Graw-Hill,
2005.
Buku.
Gaya MLA
Signature reading level E.
.
New York:
Mc Graw-Hill,
2005.
Buku.
Gaya Turabian
Signature reading level E.
New York:
Mc Graw-Hill,
2005.
Buku.