Titi Nur Izzati, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2009
UI - Tesis (Open)
edited by Alan Bryman, Robert G. Burgess
Routledge , 1995
Buku Teks
Markus, Gregory B., author
Sage, 1979
Buku Teks
Nation, I.S.P., author
Heinle Cengage Learning, 2011
Buku Teks
Buku Teks