Aranete, Fransisco
Areneta University, 1967
Buku Teks
Intal, Ponciano, author
Economic Research Instutute for ASEAN and East Asia, 2015
Buku Teks
edited by Sanchita Basu Das, Lee Poh Onn
Institute of Southeast Asian Studies , 2014
eBooks
Unesco Press, 1979
Buku Teks
Zaidan, George C., author
The John Hopkins University Press, 1971
Buku Teks