Mathias, Peter
Methuen , 1979
Buku Teks
Veltman, Martin
De Arbeiderspers, 1991
Buku Teks
Purwo Husodo, author
Universitas Indonesia, 1997
UI - Tesis (Membership)
Lamm, Martin
Norwood Editions,, 1977
Buku Teks
by Alex Seran [and others]
Universitas Katolik Indonesia Atma Jaya, [date of publication not identified]
Buku Teks