Gaya APA
Sumardi, .
(2007).
Dasar-dasar Perlindungan Hutan
.
Yogyakarta ; Indonesia:
Gadjah Mada University Press.
Gaya MLA
Sumardi, .
"Dasar-dasar Perlindungan Hutan".
Yogyakarta ; Indonesia:
Gadjah Mada University Press,
2007.
Textbook.