Gaya APA
Briggs, Jgr. (2002).
Sclence in focus chmistry .
Amerika:
Longman.
Gaya Chicago
Briggs, Jgr.
Sclence in focus chmistry.
Amerika:
Longman,
2002.
Buku.
Gaya MLA
Briggs, Jgr.
Sclence in focus chmistry.
Amerika:
Longman,
2002.
Buku.
Gaya Turabian
Briggs, Jgr.
Sclence in focus chmistry.
Amerika:
Longman,
2002.
Buku.