Schur, Edwin M., author
Random House, 1968
Buku Teks
Winda Fitri Subekti, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1999
UI - Skripsi (Membership)
Tomasic, Roman, author
The Law Foundation of New South Wales and George Allen & Unwin, 1978
Buku Teks
Smith, Mike (J. Mike), author
Australia Brodcasting Corporation , 1986
Buku Teks
Raybourn, Deanna, author
PT Gramedia Pustaka Utama, 2015
Buku Teks