Gaya APA
Hardjasoemantri, K. (1989).
Environmental Legislation In Indonesia (Second edition).
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
Hardjasoemantri, Koesnadi.
"Environmental Legislation In Indonesia".
Second edition
Yogyakarta:
Gadjah Mada University Press,
1989.
Monograf.