Barbour, Stephen
Variation in German: a critical approach to German sociolinguistics
Cambridge [England]; New York Cambridge University Press 1990,
 Buku Teks
Meeting the East Asia challenge : trends, prospects and policies / Alan Bollard ...[et al]
Victoria University Press, 1989
 Buku Teks
Yolanda Ryan Armindya
Fenomena alih kode Bahasa Indonesia - Bahasa Inggris: Kajian sosiolinguistik = The phenomenon of code switching on Indonesian - English: A study of sociolinguistics
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
 UI - Skripsi Membership
Buku nemai ... [et al.]
Irian Jaya Uncen-SIL 1983
 Buku Teks
Mahathir bin Mohamad, 1925-
The challenge
Pelanduk Publications, 1986
 Buku Teks