Chopra, Deepak, author
Harmony Books, 1995
Buku Teks
Plante, Lynda La
Simon & Schuster, 2004
Buku Teks
Werlin, Marvin
Fawcett Gold Medal, 1990
Koleksi Publik
Pick, John
E. & F. N. Spon, 1980
Buku Teks
Rubinstein, Ronald, author
Pelican Books, 1947
Buku Teks