Jaensch, Dean Harold
Allen & Unwin, 1989
Buku Teks
Mckinlay, Brian
Drummond, 1979
Buku Teks
McQueen, Humphrey
Penguin books, 1970
Buku Teks
Fitzgerald, Ross
University of Queensland Press, 1984
Buku Teks
Siregar, Julio Elia
Universitas Indonesia, 2015
UI - Skripsi (Membership)