Nelson, Benjamin N., 1911-1977, author
The University of Chicago Press, 1969
Buku Teks
Blaise, Clark, author
General Publishing, 1974
Buku Teks
Corry, Stephen, author
Freeman Press, 2011
Buku Teks
Rosile, Grace Ann, author
Emerald, 2016
eBooks
Doren, Charles van, author
Frederick A. Praeger , 1967
Buku Teks