Gaya APA
Water purification. (2009).
New York:
Novascience Publisher.
Gaya Chicago
Water purification.
.
New York:
Novascience Publisher,
2009.
Text.
Gaya MLA
Water purification.
.
New York:
Novascience Publisher,
2009.
Text.
Gaya Turabian
Water purification.
New York:
Novascience Publisher,
2009.
Print.