M. Nijhoff Publishers, 1994
Buku Teks
McWhinney, Edward
A.W. Sijthoff, 1966
Buku Teks
Filippov, Mikhail
Cambridge University Press, 2003
Buku Teks
Joske, Percy Ernest
Butterworth, 1967
Buku Teks
edited by Robert A. Goldwin
Rand McNally, 1963
Buku Teks