Gaya APA
Sumardi, . (2004).
Dasar-dasar perlindungan hutan/Sumardi, S.M. Widyastuti .
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
Sumardi, .
"Dasar-dasar perlindungan hutan/Sumardi, S.M. Widyastuti".
Yogyakarta:
Gadjah Mada University Press,
2004.
Printed Book.