Martin Montgomery ... [and others]
Routledge , 2007
Buku Teks
Richards, Jack C., author
Cambridge University Press, 2009
Buku Teks
Rifki Oktoviandry, author
2017
UI - Tesis (Membership)
Sinaga, Nenni Triana, author
Universitas HKBP Nonmensen, 2017
Artikel Jurnal
Grellet, Francoise, author
Cambridge University Press, 1994
Buku Referensi