Gaya APA
Silalahi,Daud, . (2006).
Comparative Analysis of National Legislation on Environmental Management .
Jakarta Timur:
Departement Of Law and Human Righ.
Gaya MLA
Silalahi,Daud, .
"Comparative Analysis of National Legislation on Environmental Management".
Jakarta Timur:
Departement Of Law and Human Righ,
2006.
Text.