James, Preston E.
All possible worlds : a history of geographical ideas
John Wiley & Sons, 1981
 Buku Teks SO
Dendy Sugono
The language attitude of border peoples : Insular Riau, West Kalimantan, East Kalimantan, North Sulawesi, and the Eastern Sunda Islands / Dendy Sugono, Imam Budi Utomo, Menuk Hardaniwati, Foriyani Subiyatningsih
University of Indonesia, Faculty of Humanities, 2011
 Artikel Jurnal
Hoogervorst, Tom Gunnar
Some introductory notes on the development and characteristics of sabah malay
Faculty of Humanities University of Indonesia, 2011
 Artikel Jurnal
McNally, Rand
Atlas of world history
Rand McNally & Co, 1957
 Buku Referensi
The Cambridge world history of human disease
editor, Kenneth F. Kiple ; executive editor, Rachael Rockwell Graham ; associate editors, David Frey [and others] ; assistant editors, Alicia Browne [and others]
Cambridge University Press, 1995
 Buku Referensi