Castillo, Carlos, 1889-1967, compiler
The University of Chicago Press, 1948
Buku Referensi
compiled by Carlos Castillo & Otto F. Bond
The University of Chicago Press, 1948
Buku Referensi
University of Chicago Press, 1993
Buku Teks
Fucilla, Joseph G., author
Follett Publishing Company, 1964
Buku Referensi
Vox, author
McGraw-Hill, 2012
Buku Referensi