edited by Erica l. Dolgin and Thomas G.P. Guilbert
West Publishing, 1997
Buku Teks
Player, Macka
West Publishing, 1992
Buku Teks
Cook, Franklin Henry
Macmillan, 1951
Buku Teks
Stanley, Joyce, 1901-, author
Warren, Gorham and Lamont, 1971
Buku Teks
Chommie, John C., author
West Publishing, 1968
Buku Teks