Sheddy Nagara Tjandra
University of Indonesia, 1976
Buku Teks SO
Bussmann, Hadumod
Routledge, 1996
Buku Referensi
by Member of the Summer Institute of Linguistics
University of Sydney, 1958
Buku Teks SO
Eka Marthanty Indah Lestari
Sekolah Kajian Stratejik dan Global Universitas Indonesia, 2011
UI - Tesis Membership
Kluwer Academic Publishers , 1993
Buku Teks SO