Frederick A. Praeger Publishers, [date of publication not identified]
Buku Teks
Lonsdale, Richard E.
John Wiley & Sons, 1979
Buku Teks
Artikel Jurnal
Mountjoy, Alan B.
Hutchinson University Library, 1963
Buku Teks
Mountjoy, Alan B.
Hutchinson University Library, 1971
Buku Teks