Commercial Press, 1926
Buku Klasik
Matheis Jacobus Usmany, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1997
UI - Skripsi (Membership)
K. Fuhri, [date of publication not identified]
Buku Klasik
David Campbell Publishers, 1998
Buku Referensi
Vaganay, Leon, author
Cambridge University Press, 1991
Buku Teks