Fried, George H., author
McGraw-Hill, 1995
Buku Teks
Beck, Raymond W., author
Burgess, 1977
Buku Teks
Gage, John D., author
Cambridge University Press, 1992
Buku Teks
Beck, Raymond W., author
Burgess, 1977, 1977
Buku Teks
edited by D.S. McLusky and A.J. Berry
Pergamon Press, 1978
Buku Teks