Gita Fedora Ramdhani
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2020
UI - Tesis Membership
edited by Jessica Williams and Bill Van Patten
NY : Routledge, 2015
Buku Teks
Edited by Alison Mackey, Dudan M. Gass
Wiley-Blackwell, 2012
Buku Teks SO
Long, Mike
Wiley Blackwell, 2015
Buku Teks
Nunan, David
Cambridge University Press, 2006
Buku Teks