Friedman, Lawrence M., 1930-
W.W. Norton, 1984
Buku Teks
Arbetmen, Lee P.
West Publishing, 1990
Buku Teks
Ross, Martin J.
A Fawcett Crest Book, 1975
Buku Teks
Publications International, 1990
Buku Teks
Sloan, Irving J.
Oceana Publications, 1987
Buku Teks