Nugroho Widodo
Fakultas Teknik Universitas Indonesia, 1998
UI - Skripsi (Membership)
Rhodin, Johannes A.G.
"London: W B Saunders, 1963",
Buku Teks
editors by Young-Han Park
Sung Ji Hwa, 2006
Buku Referensi
Shepperd, William R.
Barnes and Noble, 1959
Buku Referensi
Gedes & Grosset, 2003
Buku Referensi