Aritonang, Dinoroy Marganda, author
School of Public Administration, National Institute of Public Administration, 2013
Artikel Jurnal
Dalton, Bill, author
California Moon Publications , 1991
Buku Referensi
Dalton, Bill, author
Moon Publications, 1980
Buku Teks
by Junji Nakagawa...[et al.]
Center for Japanese studies UI3, 2003
Buku Teks
Java Consult Limited, 2000
Buku Referensi