Milner, Jean-Claude
St. Martin’s Press, 1990
Buku Teks SO
Yule, George
Cambridge University Press, 2018
Buku Teks SO
Nissa Nuary Kinanti
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2016
UI - Makalah dan Kertas Kerja
McArthur, Thomas Burns
Cambridge University Press, 1983
Buku Teks SO
Bussmann, Hadumod
Routledge, 1996
Buku Referensi