Cuyas, Arturo, author
Appleton-Century-Crofts, 1962
Buku Referensi
Cadena, Mariano Velazquez de la, author
Follett, 1962
Buku Referensi
Fucilla, Joseph G., author
Follett Publishing Company, 1964
Buku Referensi
compiled by Carlos Castillo & Otto F. Bond
The University of Chicago Press, 1948
Buku Referensi
Castillo, Carlos, 1889-1967, compiler
The University of Chicago Press, 1948
Buku Referensi