Knowles, John, author
Sweet & Maxwell, 2012
Buku Teks
Price, Miles O. (Miles Oscar), 1890-1968, author
Brown and Company, 1979
Buku Referensi
Price, Miles Oscar, 1890-1968, author
Little, Brown, 1979
Buku Teks
Punch, Keith F., author
Sage, 2003
Buku Teks
Punch, Keith F., author
Sage Publications, 2008
Buku Teks