Fuwa Yoshitaro, Yoshida Hidemi, and Fusamae Rie
Foundation for Advanced Studies on International Development, 2001
Buku Teks SO
by Jerome A. Motto [and others]
Human Science Press, 1974
Buku Teks
2008
Majalah, Jurnal, Buletin
Artikel Jurnal
Borodzicz, Edward P.
John Wiley & Sons, 2005
Buku Teks SO