Gaya APA
Mara, D. (1994).
Guidelines for the safe use of wastewater and excreta in agriculture and aquaculture .
Bandung:
Yayasan Idayu.
Gaya MLA
Mara, Duncan.
"Guidelines for the safe use of wastewater and excreta in agriculture and aquaculture".
Bandung:
Yayasan Idayu,
1994.
Text.