edited by Magie Toy
Academy Editions, 1995
Buku Teks
Sinaga, Reynhard Tambos Maruli Tua
Fakultas Teknik Universitas Indonesia, 2006
UI - Skripsi (Membership)
Cever, Francisco Asensio
Hongkong : Page One Publishing, 1996,
Buku Referensi
Cerver, Francisco Asensio
Page One, 1996
Buku Referensi
edited by Ismail Serageldin
Academy Editions, 1996
Buku Teks