Corpuz, Onofre
Prentice-Hall, 1965
Buku Teks
Gironiere, Paul P. de la
A Burke-Mailhe Publication, 1972
Buku Teks
Macleride, Sean, author
Balai Pustaka, 1983
Buku Teks
Haynes, W. Warren (William Warren), 1921-1972, author
PRENTOCE-HALL, Inc, Englewood Clifts, 1969
Buku Teks
Fitagerald, Hiram E
0, 1982
Buku Teks