Gaya APA
Hemistry technology economics. (2006).
Mesir:
[s.n.].
Gaya Chicago
Hemistry technology economics.
.
Mesir:
[s.n.],
2006.
Text.
Gaya MLA
Hemistry technology economics.
.
Mesir:
[s.n.],
2006.
Text.
Gaya Turabian
Hemistry technology economics.
Mesir:
[s.n.],
2006.
Print.