APA Style
Pakistan Science Foundation, Islamabad, Wright, Helena.. ().
Water : sources, issues and purification. .
:
.
Chicago Style
Pakistan Science Foundation, Islamabad, Wright, Helena..
Water : sources, issues and purification..
:
,
.
.
MLA Style
Pakistan Science Foundation, Islamabad, Wright, Helena..
Water : sources, issues and purification..
:
,
.
.
Turabian Style
Pakistan Science Foundation, Islamabad, Wright, Helena..
Water : sources, issues and purification..
:
,
.
.