Indonesian Journal of Conservation
Badan Pengembangan Konservasi UNS,
 Majalah, Jurnal, Buletin
Mangroves for national development and conservation in Indonesia : challenges for the future
 Artikel Jurnal
Panjaitan, Pohan
Determination the location and size of each zona of regional water conservation area in central tapanuli distric / Pohan Panjaitan
Universitas HKBP Nonmensen, 2016
 Artikel Jurnal
Cunha, George Daniel Martin
Conservation of library materials: a manual and bibliography on the care, repair and restoration of library materials
Scarecrow Press, 1967
 Buku Teks
Spellerberg, Ian F.
Biological conservation
Cambridge University Press, 1992
 Buku Teks