Freedman, Amy L.
Routledge, 2000
Buku Teks
Rose, Peter I., foreword
Random House, 1964
Buku Teks
Schaefer, Richard T
Pearson Education, 2015
Buku Teks
Pasaribu, Ruth Vania Christine
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2014
UI - Skripsi (Membership)
Sakinatuzzahra
Program Pascasarjana Universitas Indonesia, 2017
UI - Tesis (Membership)