Zierep, Jurgen
Springer-Verlag, 1978
Buku Teks
edited by Jaime Klapp, Anne Cros, Oscar Velasco Fuentes, Catalina Stern, Mario Alberto Rodriguez Meza
Springer, 2012
eBooks
Warsi, Z.U.A.
CRC Press, 1999
Buku Teks
John, James, auhtor
Pearson - Prentice Hall, 2006
Buku Teks
Institute of Southeast Asian Studies, 1996
Buku Teks