Merrifield, Leroy S.
The michie compony, 1994
Buku Teks
Player, Macka
West Publishing, 1992
Buku Teks
Dodd, Walter Fairleigh, 1880-1960, author
West Publishing, 1949
Buku Teks
Edwards, Harry T.
The michie compony, 1991
Buku Teks
Player, Mack A., author
West Publishing, 1981
Buku Referensi