Gaya APA
Hopkins, D, R. (1990).
Report on IDWSSD Impact on Dracunculiasis .
Atlanta:
International Drinking Water Supply and Sanitation Decade.
Gaya MLA
Hopkins, Donald, R..
"Report on IDWSSD Impact on Dracunculiasis".
Atlanta:
International Drinking Water Supply and Sanitation Decade,
1990.
print.