Mildred Elizabeth Aldridge, author
Seameo Biotrop, 2019
Artikel Jurnal
BAKOSURTANAL
Badan Koordinasi Survei dan Pemetaan Nasional (Bakosurtanal), 2001
Buku Referensi
Kochtanek, Thomas R., author
Libraries Unlimited , 2002
Buku Teks
Fulkerson, Diane M., author
Information Science Reference, 2012
Buku Teks
iGroup (asia Pacific), 2006
Majalah, Jurnal, Buletin