Gaya APA
HARDJASOEMANTRI, K. (1989).
Environmental legislation in Indonesia (2, cet. 3).
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
HARDJASOEMANTRI, Koesnadi.
"Environmental legislation in Indonesia".
2, cet. 3
Yogyakarta:
Gadjah Mada University Press,
1989.
Buku.