Gaya APA
Physical Science. (2007).
Boston:
Mc Graw Hill.
Gaya Chicago
Physical Science.
7th.
Boston:
Mc Graw Hill,
2007.
Buku.
Gaya MLA
Physical Science.
7th.
Boston:
Mc Graw Hill,
2007.
Buku.
Gaya Turabian
Physical Science.
Boston:
Mc Graw Hill,
2007.
Buku.