Keuth, Herbert, 1940-
Cambridge University Press, 2005
Buku Teks SO
Alfons Taryadi
Gramedia, 1989
Buku Teks SO
Alfons Taryadi
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 1979
UI - Skripsi Membership
Foreign Languages Publishing House, 1892
Buku Teks SO
Andreas J. Ata Ujan
Universitas Indonesia, 1987
UI - Skripsi Membership