Gaya APA
Mc Graw Hill Education. (2010).
Singapore:
Mc Graw Hill.
Gaya Chicago
Mc Graw Hill Education.
.
Singapore:
Mc Graw Hill,
2010.
Buku.
Gaya MLA
Mc Graw Hill Education.
.
Singapore:
Mc Graw Hill,
2010.
Buku.
Gaya Turabian
Mc Graw Hill Education.
Singapore:
Mc Graw Hill,
2010.
Buku.