Robinson, Glen O., author
West Publishing, 1986
Buku Teks
Robinson, Glen O., author
West Publishing, 1974
Buku Teks
Roy, Robert H., author
John Hopkins Press, 1958
Buku Teks
Scheb, John M., author
Thomson Wadworth, 2005
Buku Teks
Gellhorn, Ernest, author
West Publishing Company, 1972
Buku Teks