Weston, Paul B., author
Prentice-Hall, 1977
Buku Teks
Weston, Paul B., author
Prentoce-Hall, 1981
Buku Teks
Blanchard, Robert E., author
John Wiley & Sons, 1975
Buku Teks
Feld, barry c., author
Thomson/West, 2009
Buku Teks
Asean Law Association of the Philippines. Inc, 1982
Majalah, Jurnal, Buletin