Robbins, Joel,1961-
Univ. of Calif. Press, 2004
Buku Teks
Woolford, Donald Mark, author
University of Queensland Press, 1976
Buku Teks
Robson, R.W., author
Pacific Publications PTY, 1954
Buku Teks
Wilson, Lindsay
McGraw-Hill , 1975
Buku Teks
Sydney University Press, 1974
Buku Teks