Istana Kepresidenan, 1978
Buku Referensi
Florida, Nancy K., author
Southeast Asia Program, 2000
Buku Teks
Lumban Tobing, Lolita Refani, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2012
UI - Skripsi (Open)
Anie Wijaya, author
2015
UI - Tesis (Membership)
Carroll, Dennis, author
Macmillan, 1987
Buku Teks