APA Style
Helmer, Richard, Lloyd, Barry. (1991).
Surveillance of DRINKING WATER QUALITY IN RURAL AREAS .
New York:
Longman Scientific & Technical.
Chicago Style
Helmer, Richard, Lloyd, Barry.
Surveillance of DRINKING WATER QUALITY IN RURAL AREAS.
New York:
Longman Scientific & Technical,
1991.
Text.
MLA Style
Helmer, Richard, Lloyd, Barry.
Surveillance of DRINKING WATER QUALITY IN RURAL AREAS.
New York:
Longman Scientific & Technical,
1991.
Text.
Turabian Style
Helmer, Richard, Lloyd, Barry.
Surveillance of DRINKING WATER QUALITY IN RURAL AREAS.
New York:
Longman Scientific & Technical,
1991.
Print.