Stephens, Richard B., author
Warren, Gorham and Lamont, 1959
Buku Teks
Mcnulty, John K., author
west Publishing, 1989
Buku Teks
Mcnulty, John K., author
West Publishing, 1994
Buku Teks
Spence, Catherine Helen
Penguin Books, 1984
Buku Teks
Krol, Gerrit, author
EM. Querido's, 1981
Buku Teks