Gaya APA
Briscoe, J., Feachem, R, G. (1987).
Evaluating Health Impact: Water Supply, Sanitation, and Hygiene Education .
Ottawa:
International Development Research Centre.
Gaya MLA
Briscoe, John., Feachem, Richard, G..
"Evaluating Health Impact: Water Supply, Sanitation, and Hygiene Education".
Ottawa:
International Development Research Centre,
1987.
print.