The Japan Foundantion, 1974
Buku Teks
Lulu Lucyana, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2003
UI - Skripsi (Membership)
Marita, author
2007
UI - Tesis (Membership)
Carson, A. Brinton
McGraw-Hill, 1965
Buku Teks
Chellis, Robert D
McGraw-Hill Company, 1961
Buku Teks