Rogers, Margaret
Oceana Publications Inc., 1969
Buku Teks
University of the Philippines , 1971
Buku Teks
by Len Young Smith ... [et al.]
West Publishing, 1982
Buku Teks
Shijan Mo, John, author
Lexis lexis, 2013
Buku Teks
Bartholomew, G. W., author
Malayan Law Journal Limited, 1965
Buku Teks