Stachowitsch, Michael, author
Wiley-Liss, 1992
Buku Teks
Freedman, Alan, author
Amacom, 1995
Buku Referensi
Greenfield, Jane, author
Oak Knoll Press, 1998
Buku Teks
Andersen, Dines
Copenhagen: Gyldendalske Boghandel, 1907
Buku Teks
American Psychiatric Press, 1984
Buku Referensi