Trungpa, Chogyam, author
Shambhala, 2003
Buku Teks
Cowan, James, author
Simon & Schuster, 1991
Buku Teks
Day, A. Grove (Arthur Grove), 1904-1994, author
University of Nebraska Press, 1951
Koleksi Publik
University Tutorial Press , 1977
Buku Teks
Grove, Wendell E.
Prentice-Hall, 1966
Buku Teks