Monteiro, George, author
University of Kentucky Press, 1996
Buku Teks
Clark, Thomas D.
Oxford University Press, 1961
Buku Teks
Wood, A.W.
Mouton, 1974
Buku Teks
Boles, John B., author
Blackwell Publishers, 2002
Buku Teks
Departemen Pendidikan dan Kebudayaan, RI, 1985
Buku Teks