Satyawati Sulaiman, author
Pusat Penelitian Purbakala dan Peninggalan Nasional, 1977, 1978
Buku Teks
Barnes, James F., author
St. Martin`s Press, 1980
Buku Teks
Campbell, George L., author
Routledge, 1995
Buku Referensi
Lye, Keith, author
The Royal Geographical Society, 2000
Buku Referensi
Sampson, George, author
University Press, 1949
Buku Referensi