Jasny, Naum
The University of Chicago Press , 1961
Buku Teks
Frederick A. Praeger Publishers, [date of publication not identified]
Buku Teks
Lonsdale, Richard E., author
John Wiley & Sons, 1979
Buku Teks
Artikel Jurnal
Mountjoy, Alan B., author
Hutchinson University Library, 1963
Buku Teks