William Kaufmann, 1982
Buku Teks
editor, Andrea Deplazes
Birkauser, 2005
Buku Referensi
Harris, Charles W., co-editor ; Dines, Nicholas T., co-editor
McGraw-Hill, 1998
Buku Referensi
[publisher not identified], [date of publication not identified]
Naskah
Kidder, Frank E., author
John Wiley & Sons, 1931
Buku Referensi