White, Carl M., author
Bedminster Press, 1964
Buku Teks
Rice, Thomas Jackson, author
Gale Research Company, 1983
Buku Referensi
compiled by Jenney Morgan
Routledge , 1996
Buku Referensi
edited by Albert D. Van Nostrrandvan
Books for Libraries Press, 1970
Buku Teks
Pemberton, John E., author
Pergamon Press, 1969
Buku Teks