Gaya APA
Surveillance of drinking water quality. (1976).
Malang Kota:
WHO, Geneva.
Gaya Chicago
Surveillance of drinking water quality.
.
Malang Kota:
WHO, Geneva,
1976.
Text.
Gaya MLA
Surveillance of drinking water quality.
.
Malang Kota:
WHO, Geneva,
1976.
Text.
Gaya Turabian
Surveillance of drinking water quality.
Malang Kota:
WHO, Geneva,
1976.
Print.