Corpuz, Onofre
Prentice-Hall, 1965
Buku Teks
Buku Teks
Majul, Cesar A., author
The University of The Philippines Press, 1973
Buku Teks
Majul, Cesar A., author
University of the Philippines Press, 1999
Buku Teks
Abaya, Hernando J., author
Malaya BOoks, 1970
Buku Teks