Mulyo Wibowo
Interchange center
Fakultas Teknik Universitas Indonesia, 1995
 UI - Skripsi (Membership)
Strutt, Peter
English for international tourism
Pearson, 2019
 Buku Teks
Cambridge international dictionary of english
editor in chief Paul Procter
Cambridge University Press, 1995
 Buku Referensi
Wallwork, Adrian
English for Presentations at International Conferences
Springer, 2010
 Buku Teks
Guthrie, L.O.
Factual communication : a handbook American English
Macmillan, 1956
 Buku Teks