Gaya APA
DevelopingWord Energy 1998. (1998).
london:
Cornhill Publication Limited.
Gaya Chicago
DevelopingWord Energy 1998.
.
london:
Cornhill Publication Limited,
1998.
Text.
Gaya MLA
DevelopingWord Energy 1998.
.
london:
Cornhill Publication Limited,
1998.
Text.
Gaya Turabian
DevelopingWord Energy 1998.
london:
Cornhill Publication Limited,
1998.
Print.