Weinreb, Lloyd L.
Harvard University Press, 1987
Buku Teks
Febleman, James K.
Martinus Nijhoff Publushers, 1985
Buku Teks
Auerbach, Jerold S., author
Oxford University Press, 1983
Buku Teks
Prassel, Frank R., author
Goodyear, 1979
Buku Teks
Pound, Roscoe, author
Yale University Press, 1952
Buku Teks