Laurel, Jose P., author
Lyceum Press, 1966
Buku Referensi
King, James J
John Wiley & Sons, 1995
Buku Referensi
Bibliography Division The National Library , 1978
Buku Teks
Pramudya A. Oktavinanda, author
University of Indonesia, Faculty of Law, 2018
Artikel Jurnal
Wade, E. C. S. (Emlyn Capel Stewart), author
Longmans Green, 1951
Buku Teks